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Todd E Katzner

My research interests focus on wildlife conservation ecology and the interaction between wildlife and the role of wildlife in natural systems. 

Much of my work is built around utilization of novel technologies and approaches to wildlife ecology. I was part of a team that developed the first non-invasive monitoring scheme for any avian species, I was involved in development of novel high-frequency GPS-GSM telemetry systems for tracking migratory birds, and I developed a network of camera traps to monitor abundance and distribution of terrestrial avian scavengers across eastern North America. Much of my recent funding is focused on evaluating the potential impacts of renewable energy development on conservation-dependent birds.

Education and Certifications

  • Ph.D., Arizona State University, Tempe, AZ (2003)

  • M.S., University of Wyoming, Laramie, WY (1994)

  • B.A., Oberlin College, Oberlin, OH (1991)

Science and Products

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USGS science for a changing world

Interaction Between Alternative Energy Development and Raptors

Energy production has become essential for modern society. At the same time, this process can have negative effects on wildlife and ecosystems. It is in the best interest of society and the environment to understand these effects and to manage and mitigate for them. Our team focuses on measuring how energy development influences birds of prey and learning how to minimize impacts.
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Ecosystems, Energy & Wildlife, Wildlife Program, Forest and Rangeland Ecosystem Science Center
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Interaction Between Alternative Energy Development and Raptors

Energy production has become essential for modern society. At the same time, this process can have negative effects on wildlife and ecosystems. It is in the best interest of society and the environment to understand these effects and to manage and mitigate for them. Our team focuses on measuring how energy development influences birds of prey and learning how to minimize impacts.
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USGS science for a changing world

Conservation Ecology and Monitoring of Raptors

Raptors, or birds of prey, are often used to indicate the state of an ecosystem, and monitoring their populations can help us to understand ecosystem processes. Raptors are particularly good animals for monitoring because they are big and therefore charismatic and easy to observe. Whether we’re monitoring nesting biology and reproductive output, counting individuals on roads, or setting up trail...
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Ecosystems, Energy & Wildlife, Forest and Rangeland Ecosystem Science Center
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Conservation Ecology and Monitoring of Raptors

Raptors, or birds of prey, are often used to indicate the state of an ecosystem, and monitoring their populations can help us to understand ecosystem processes. Raptors are particularly good animals for monitoring because they are big and therefore charismatic and easy to observe. Whether we’re monitoring nesting biology and reproductive output, counting individuals on roads, or setting up trail...
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USGS science for a changing world

Bird Movement and Migration

Migration is an amazing annual event. Every year billions of animals – birds, mammals, insects, and fish – make long-distance journeys from breeding grounds to wintering grounds. Most northern hemisphere birds migrate southward, but there are many other ways that birds move seasonally. If we want to protect birds that take these long distance journeys, we need to understand why they move, why they...
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Ecosystems, Energy & Wildlife, Wildlife Program, Forest and Rangeland Ecosystem Science Center
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Bird Movement and Migration

Migration is an amazing annual event. Every year billions of animals – birds, mammals, insects, and fish – make long-distance journeys from breeding grounds to wintering grounds. Most northern hemisphere birds migrate southward, but there are many other ways that birds move seasonally. If we want to protect birds that take these long distance journeys, we need to understand why they move, why they...
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If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

Predictor, null model, response variable, and habitat suitability prediction rasters for a golden eagle hierarchical Bayesian synoptic model used for habitat selection in San Diego County, California. Derived from golden eagle data collected from November

This data release includes three types of data used in habitat modeling, and predictions from the habitat models. (1) Predictor rasters for proportion urban development within 1-km radius, proportion exurban within 1-km radius, vector ruggedness measure (VRM) within 500-m radius, topographic position index (TPI) within 500-m radius. (2) Twenty-nine null models for space use for 29 different golden
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Western Ecological Research Center (WERC)

If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

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If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

Filter Total Items: 88

Linking behavioral states to landscape features for improved conservation management

A central theme for conservation is understanding how animals differentially use, and are affected by change in, the landscapes they inhabit. However, it has been challenging to develop conservation schemes for habitat-specific behaviors.Here we use behavioral change point analysis to identify behavioral states of golden eagles (Aquila chrysaetos) in the Sonoran and Mojave Deserts of the southwest
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Endangered Australian top predator is frequently exposed to anticoagulant rodenticides

Anticoagulant rodenticides (ARs) used to control mammalian pest populations cause secondary exposure of predatory species throughout much of the world. It is important to understand the drivers of non-target AR exposure patterns as context for assessing long-term effects and developing effective mitigation for these toxicants. In Australia, however, little is known about exposure and effects of AR
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Predicted climate-induced reductions in scavenging in eastern North America

Scavenging is an important function within ecosystems where scavengers remove organic matter, reduce disease, stabilize food webs, and generally make ecosystems more resilient to environmental changes. Global change (i.e., changing climate and increasing human impact) is currently influencing scavenger communities. Thus, understanding what promotes species richness in scavenger communities can hel
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Golden Eagle

The Golden Eagle inhabits a wide range of latitudes and habitats throughout the Palearctic and into northern Africa, where it is largely resident. In North America, its breeding distribution includes most of Canada and Alaska, as well as the western half of the United States and northern and western Mexico. Most eagles that nest in northern Canada and interior and northern Alaska migrate thousands
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Relative energy production determines effect of repowering on wildlife mortality at wind energy facilities

Reduction in wildlife mortality is often cited as a potential advantage to repowering wind facilities, that is, replacing smaller, lower capacity, closely spaced turbines, with larger, higher capacity ones, more widely spaced. Wildlife mortality rates, however, are affected by more than just size and spacing of turbines, varying with turbine operation, seasonal and daily weather and habitat, all o
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Ecosystems, Energy & Wildlife, Forest and Rangeland Ecosystem Science Center

Eagle fatalities are reduced by automated curtailment of wind turbines

Collision‐caused fatalities of animals at wind power facilities create a ‘green versus green’ conflict between wildlife conservation and renewable energy. These fatalities can be mitigated via informed curtailment whereby turbines are slowed or stopped when wildlife are considered at increased risk of collision. Automated monitoring systems could improve efficacy of informed curtailment, yet such
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Ecosystems, Energy & Wildlife, Forest and Rangeland Ecosystem Science Center

Yearly temperature fluctuations and survey speed influence road counts of wintering raptors

Globally, evaluation of population trends is the most pressing research need for many species of conservation concern. Road counts for birds of prey are useful for monitoring long‐term population trends and examining year‐to‐year variations in abundance. We examined data from 2155 road surveys conducted from 2001 to 2018 by community scientists who recorded > 85 000 individuals of 14 species of ra
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Shared functional traits explain synchronous changes in long‐term count trends of migratory raptors

AimAssessing long‐term shifts in faunal assemblages is important to understand the consequences of ongoing global environmental change. One approach to assess drivers of assemblage changes is to identify the traits associated with synchronous shifts in count trends among species. Our research identified traits influencing trends in 73 years of count data on migrating raptors recorded in the north‐
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Ecological insights from three decades of animal movement tracking across a changing Arctic

The Arctic is entering a new ecological state, with alarming consequences for humanity. Animal-borne sensors offer a window into these changes. Although substantial animal tracking data from the Arctic and subarctic exist, most are difficult to discover and access. Here, we present the new Arctic Animal Movement Archive (AAMA), a growing collection of more than 200 standardized terrestrial and mar
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Ecosystems, Western Ecological Research Center (WERC)

Evaluating a rapid field assessment system for anticoagulant rodenticide exposure of raptors

Anticoagulant rodenticides (ARs) are commonly used to control rodent pests. However, worldwide, their use is associated with secondary and tertiary poisoning of nontarget species, especially predatory and scavenging birds. No medical device can rapidly test for AR exposure of avian wildlife. Prothrombin time (PT) is a useful biomarker for AR exposure, and multiple commercially available point-of-c
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Ecosystems, Eastern Ecological Science Center, Forest and Rangeland Ecosystem Science Center, Patuxent Wildlife Research Center

Relative abundance of coyotes (Canis latrans) influences gray fox (Urocyon cinereoargenteus) occupancy across the eastern United States

Gray fox (Urocyon cinereoargenteus (Schreber, 1775)) populations in portions of the eastern United States have experienced declines whose trajectories differ from those of other mesocarnivore populations. One hypothesis is that gray fox declines may result from interspecific interactions, particularly competition with abundant coyotes (Canis latrans Say, 1823). Alternatively, gray foxes may respon
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Ecosystems, Forest and Rangeland Ecosystem Science Center

High frequency of lead exposure in the population of an endangered Australian top predator, the Tasmanian wedge-tailed eagle (Aquila audax fleayi)

Lead poisoning, mainly through incidental ingestion of lead ammunition in carcasses, is a threat to scavenging and predatory bird species worldwide. In Australia, shooting for animal control is widespread, and a range of native scavenging species are susceptible to lead exposure. However, the prevalence of lead exposure in Australia's scavenging and predatory birds is largely unknown. We evaluated
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Ecosystems, Forest and Rangeland Ecosystem Science Center

Pre-USGS Publications

Katzner, T.E., Miller, T.A., Rodrigue, J.L., Shaffer, S., 2015, A Most Dangerous Game- Death and Injury to Birds from Porcupine Quills: Wilson Journal of Ornithology, v. 127, no. 1, p. 102-108, https://doi.org/10.1676/14-066.1.
Behmke, S., Fallon, J.A., Duerr, A., Lehner, A., Buchweitz, J., Katzner, T.E., 2015, Chronic lead exposure is epidemic in obligate scavenger populations in eastern North America: Environment International, v. 79, p. 51-55, https://doi.org/10.1016/j.envint.2015.03.010.
Duerr, A.E., Miller, T.A., Lanzone, M.J., Brandes, D., Cooper, J., O'Malley, K., Maisonnueve, C., Tremblay, J., Katzner, T.E., 2015, Flight response of slope-soaring birds to seasonal variation in thermal generation: Functional Ecology, v. 29, no. 6, p. 779-790, https://doi.org/10.1111/1365-2435.12381.
Dennhardt, A.J., Duerr, A.E., Brandes, D., Katzner, T.E., 2015, Integrating citizen-science data with movement models to estimate the size of a migratory golden eagle population: Biological Conservation, v. 184, p. 68-78, https://doi.org/10.1016/j.biocon.2015.01.003.
Morneau, F., Tremblay, J., Todd, C., Chubbs, T.E., Maisonnueve, C., Lemaıˆtre, J., Katzner, T.E., 2015, Known Breeding Distribution and Abundance of Golden Eagles in Eastern North America: Northeastern Naturalist, v. 22, no. 2, p. 236-247, https://doi.org/10.1656/045.022.0201.
Miller, T.A., Brooks, R.P., Lanzone, M.J., Brandes, D., Cooper, J., Tremblay, J., Wilhelm, J., Duerr, A.E., Katzner, T.E., 2015, Limitations and mechanisms influencing the migratory performance of soaring birds: Ibis, v. 158, no. 1, p. 116-134, https://doi.org/10.1111/ibi.12331.
Dennhardt, A.J., Duerr, A.E., Brandes, D., Katzner, T.E., 2015, Modeling autumn migration of a rare soaring raptor identifies new movement corridors in central Appalachia: Ecological Modelling, v. 303, p. 19-29, https://doi.org/10.1016/j.ecolmodel.2015.02.010.
Katzner, T.E., Turk, P., Duerr, A.E., Miller, T.A., Lanzone, M.J., Cooper, J., Brandes, D., Tremblay, J., Lemaıˆtre, J., 2015, Use of multiple modes of flight subsidy by a soaring terrestrial bird, the golden eagle Aquila chrysaetos, when on migration: Journal of the Royal Society Interface, v. 12, no. 112, p. 20150530, https://doi.org/10.1098/rsif.2015.0530.
Pettorelli, N., Evans, D.M., Garner, T.W., Katzner, T.E., Gompper, M.E., Altwegg, R., Branch, T.A., Johnson, J.A., Pollock, K., DaVolls, L., Rantanen, E., Gordon, I.J., 2013, Addressing gender imbalances in Animal Conservation: Animal Conservation, v. 16, p. 131-133, https://doi.org/10.1111/acv.12032.
Katzner, T.E., Collar, N.J., 2013, Are insular populations of the Philippine falconet (Microhierax erythrogenys) steps in a cline?: The Condor, v. 115, no. 3, p. 576-583, https://doi.org/10.1525/cond.2013.120070.
Latta, S.C., Musher, L.J., Latta, K.N., Katzner, T.E., 2013, Influence of human population size and the built environment on avian assemblages in urban green spaces: Urban Ecosystems, v. 16, no. 3, p. 463-479, https://doi.org/10.1007/s11252-012-0282-z.
Sklyarenko, S.L., Katzner, T.E., 2012, The Status of Populations of Vultures in Kazakhstan In Kovshar, A.F., Rustamov, E.A., Mitropolsky, O.V., Levin, A.S., Kovshar, V.A., eds., Ornithological News of Kazakhstan and Middle Asia: ISBN 978-601-7287-05-4, Almaty, Kazakhstan, Menzbier’s Ornithological Society, p. 178-185.
Katzner, T.E., Winton, J.D., McMorris, F.A., Brauning, D., 2012, Dispersal, Band Encounters, and Causes of Death in a Reintroduced and Rapidly Growing Population of Peregrine Falcons: Journal of Raptor Research, v. 46, no. 1, p. 75-83, https://doi.org/10.3356/JRR-10-93.1.
Al Hasani, I.K., Azar, J.F., Nishimura, K., Amr, Z.S., Katzner, T.E., 2012, Distribution, diet and winter ecology of the Imperial Eagle Aquila heliaca in Jordan.: Vertebrate Zoology, v. 62, no. 2, p. 273-280.
Borher, G., Brandes, D., Mandel, J., Bildstein, K.L., Miller, T., Lanzone, M., Katzner, T.E., Maissoneuve, C., Tremblay, J., 2012, Estimating updraft velocity components over large spatial scales- Contrasting migration strategies of golden eagles and turkey vultures: Ecology Letters, v. 15, no. 2, p. 96-103, https://doi.org/10.1111/j.1461-0248.2011.01713.x.
Branch, T.A., Austin, J.D., Pollock, K., Gordon, I.J., Gompper, M.E., Katzner, T.E., Pettorelli, N., 2012, Fisheries conservation and management- finding consensus in the midst of competing paradigms: Animal Conservation, v. 15, no. 1, p. 1-3, https://doi.org/10.1111/j.1469-1795.2011.00502.x.
Lanzone, M., Miller, T., Turk, P., Brandes, D., Halverson, C., Maissoneuve, C., Tremblay, J., Cooper, J., O'Malley, K., Brooks, R., Katzner, T.E., 2012, Flight responses by a migratory soaring raptor to changing meteorological conditions: Biology Letters, v. 8, no. 5, p. 710-713, https://doi.org/10.1098/rsbl.2012.0359.
Evans, D.M., Barnard, P., Koh, L.P., Chapman, C.A., Altwegg, R., Garner, T.W., Gompper, M.E., Gordon, I.J., Katzner, T.E., Pettorelli, N., 2012, Funding nature conservation- who pays?: Animal Conservation, v. 15, no. 3, p. 215-216, https://doi.org/10.1111/j.1469-1795.2012.00550.x.
Bragin, E., Katzner, T.E., 2012, Second nest record of Smew Mergus albellus in the Naurzum forest: Russian Ornithological Society: Express Issue, v. 21, no. 743, p. 724-725.
Katzner, T.E., Smith, B.W., Miller, T.A., Brandes, D., Cooper, J., Lanzone, M., Brauning, D., Farmer, C., Harding, S., Kramer, D., Koppie, C., Maissoneuve, C., Martell, M., Mojica, E.K., Todd, C., Tremblay, J., Wheeler, M., Brinker, D.F., Chubbs, T.E., O'Malley, K., Mehus, S., Porter, B., Brooks, R.P., Watts, B.D., Bildstein, K.L., 2012, Status, biology and conservation priorities for North America’s eastern Golden Eagle (Aquila chrysaetos) population: Auk, v. 29, no. 1, p. 168-176, https://doi.org/10.1525/auk.2011.11078.
Bragin, E., Katzner, T.E., Bragin, E., 2012, Summer accumulation of large birds of prey , and the problem of estimating their number - Proceedings Menzbirovskogo Ornithological Society: Volume I: Proceedings of XIII International Ornithological Conference of Northern Eurasia, p. 234-240.
Duerr, A., Miller, T., Lanzone, M., Brandes, D., Cooper, J., O'Malley, K., Maissoneuve, C., Tremblay, J., Katzner, T.E., 2012, Testing an emerging paradigm in migration ecology shows surprising differences in efficiency between flight modes: PLOS ONE, v. 7, no. 4, p. e35548, https://doi.org/10.1371/journal.pone.0035548.
Katzner, T.E., Wheeler, M., Negro, J.J., Kapetanakos, Y., DeWoody, J.A., Horvath, M., Lovette, I., 2012, To pluck or not to pluck- scientific methodologies should be carefully chosen, not “one size fits all": Journal of Avian Biology, v. 43, p. 15-17, https://doi.org/10.1111/j.1600-048X.2011.05592.x.
Katzner, T.E., Brandes, D., Miller, T., Lanzone, M., Maissoneuve, C., Tremblay, J., Mulvihill, R., Merovich, G., 2012, Topography drives migratory flight altitude of golden eagles- implications for on-shore wind energy development: Journal of Applied Ecology, v. 49, no. 5, p. 1178-1186, https://doi.org/10.1111/j.1365-2664.2012.02185.x.
Gordon, I.J., Pollock, K., Altwegg, R., Garner, T.W., Gompper, M.E., Katzner, T.E., Pettorelli, N., Redpath, S., 2012, What the ‘food security’ agenda means for animal conservation in terrestrial ecosystems: Animal Conservation, v. 15, no. 2, p. 115-116, https://doi.org/10.1111/j.1469-1795.2012.00541.x.
Katzner, T.E., Ivy, J.R., Bragin, E., Milner-Gulland, E.J., DeWoody, J.A., 2011, Conservation implications of inaccurate estimation of cryptic population size: Animal Conservation, v. 14, no. 4, p. 328-332, https://doi.org/10.1111/j.1469-1795.2011.00444.x.
Iverson, S.A., Gavrilov, A., Katzner, T.E., Takekawa, J., Newman, S., Miller, T., Hagemeijer, W., Sivananinthaperumal, B., Mundkur, T., DeMattos, C., Ahmed, L.S., 2011, Migratory movements of waterfowl in Central Asia and avian influenza emergence- sporadic transmission of H5N1 from east to west: Ibis, v. 153, no. 2, p. 279-292, https://doi.org/10.1111/j.1474-919X.2010.01095.x.
Jones, J.P., Collen, B., Baxter, P.W., Bubb, P., Illian, J., Katzner, T.E., Keane, A., Loh, J., McDonald-Madden, E., Nicholson, E., Pereira, H., Possingham, H., Pullin, A., Rodrigues, A., Ruiz-Gutierrez, V., Sommerville, M., Milner-Gulland, E.J., 2011, The Why, What, and How of Global Biodiversity Indicators Beyond the 2010 Target: Conservation Biology, v. 25, no. 3, p. 450-457, https://doi.org/10.1111/j.1523-1739.2010.01605.x.
Terraube, J., Arroyo, B.E., Mougeot, F., Katzner, T.E., Bragin, E., 2010, Breeding biology of the Montagu’s harrier (Circus pygargus) in north-central Kazakhstan: Journal of Ornithology, v. 151, no. 3, p. 713-722, https://doi.org/10.1007/s10336-010-0505-0.
Rudnick, J.A., Katzner, T.E., DeWoody, J.A., 2009, Genetic Analyses of Noninvasively Collected Feathers Can Provide Insights into Avian Demography and Behavior In Aronoff, J.B., ed., Handbook of Nature Conservation: Hauppauge, NY, Nova Science Publishers, p. 181-197.
Miller, T.M., Brandes, D., Lanzone, M., Ombalski, D., Maisonnueve, C., Katzner, T.E., 2009, Golden eagle migration and winter behavior in Pennsylvania In Majumdar, S.K., ed., Avian Ecology and Conservation: A Pennsylvania Focus with National Implications: Immaculata, PA, Pennsylvania Academy of Sciences, p. 111-125.
Brandes, D., Miller, T.M., Katzner, T.E., 2009, Wind Power Mortality In Majumdar, S.K., ed., Avian Ecology and Conservation: A Pennsylvania Focus with National Implications: Immaculata, PA, Pennsylvania Academy of Sciences, p. 300-303.
Rudnick, J.A., Katzner, T.E., Bragin, E.A., DeWoody, J.A., 2008, A non-invasive genetic evaluation of population size, natal philopatry, and roosting behavior of non-breeding eastern imperial eagles (Aquila heliaca) in central Asia: Conservation Genetics, v. 9, p. 667-676.
Poulakakis, N., Antoniou, A., Mantziou, G., Parmakelis, A., Skartsi, T., Vasilakis, D., Elorriaga, J., De La Puente, J., Gavashelishvili, A., Ghasabyan, M., Katzner, T.E., McGrady, M.J., Batbayar, N., Fuller, M.R., Natsagdorj, T., 2008, Population structure, diversity, and phylogeography in the near-threatened Eurasian black vultures Aegypius monachus (Falconiformes; Accipitridae) in Europe- insights from microsatellite and mitochondrial DNA variation: Biological Journal of the Linnean Society, v. 95, p. 859-872.
Kenward, R., Katzner, T.E., Wink, M., Marcström, V., Walls, S., Karlbom, M., Pfeffer, R., Bragin, E.A., Hodder, K., Levin, A.S., 2007, Rapid sustainability modelling for raptors by radio tagging and DNA fingerprinting: Journal of Wildlife Management, v. 71, no. 1, p. 238-245.
Ryabtsev, V.V., Katzner, T.E., 2007, Severe declines of Eastern Imperial Eagle Aquila heliaca populations in the Baikal region, Russia- a modern and historical perspective: Bird Conservation International, v. 17, no. 03, p. 197-209.
Rudnick, J.A., Katzner, T.E., Bragin, E.A., DeWoody, J.A., 2007, Species identification of birds through genetic analysis of naturally shed feathers: Molecular Ecology Notes, p. 757-762.
Katzner, T.E., Milner-Gulland, E.J., Bragin, E.A., 2007, Using modeling to improve monitoring of structured populations- are we collecting the right data?: Conservation Biology, v. 21, no. 1, p. 241-252.
Katzner, T.E., Bragin, E.A., Milner-Gulland, E.J., 2006, Modelling populations of long lived birds of prey for conservation- a study of Imperial Eagles (Aquila heliaca) in Kazakhstan: Biological Conservation, v. 132, no. 3, p. 322-335.
Katzner, T.E., 2005, Corruption - a double-edged sword for conservation? A response to Smith and Walpole.: Oryx, v. 39, no. 3, p. 260-262.
Katzner, T.E., Robertson, S., Robertson, B., Klucsarits, J., McCarty, K.M., Bildstein, K.L., 2005, Results from a long-term nest-box program for American Kestrels- implications for improved population monitoring and conservation: Journal of Field Ornithology, v. 76, no. 3, p. 217-318.
Busch, J., Katzner, T.E., Bragin, E.A., Keim, P., 2005, Tetranucleotide microsatellites for aquila and haliaeetus eagles: Molecular Ecology Notes, v. 5, no. 1, p. 39-41.
Rudnick, J.A., Katzner, T.E., Bragin, E.A., Rhodes, O.E., DeWoody, J.A., 2005, Using naturally shed feathers for individual identification, genetic parentage analyses, and population monitoring in an endangered Eastern imperial eagle (Aquila heliaca) population from Kazakhstan: Molecular Ecology, v. 14, no. 10, p. 2959-2967.
Katzner, T.E., Hsun Lai, C., Gardiner, J.D., Foggin, J.M., Pearson, D., Smith, A.T., 2004, Adjacent nesting by Lammergeier Gypaetus barbatus and Himalayan Griffon Gyps himalayensis on the Tibetan Plateau, China: Forktail, v. 20, p. 94-96.
Leppert, L.L., Layman, S., Bragin, E.A., Katzner, T.E., 2004, Survey for Hemoparasites in Imperial Eagles (Aquila heliaca), Steppe Eagles (Aquila nipalensis), and White-tailed Sea Eagles (Haliaeetus albicilla) from Kazakhstan: Journal of Wildlife Diseases, v. 40, no. 2, p. 316-319.
Sharik, T.L., Katzner, T.E., Bragina, T.M., 2003, A new species of Copidosoma Ratzeburg (Hymenoptera- Encyrtidae) from eagle nests in Kazakhstan: Journal of Hymenoptera Research, v. 12, no. 2, p. 308-311.
Pain, D.J., Cunningham, P.G., Donald, P.F., Duckworth, J.W., Houston, D.C., Katzner, T.E., Parry-Jones, J., Poole, C., Prakash, V., Round, P., Timmins, R., 2003, Causes and impacts of temporospatial declines of Gypsvultures in Asia: Conservation Biology, v. 17, no. 3, p. 661-671.
Katzner, T.E., Parker, K.L., 1998, Long distance movements from established burrow sites by pygmy rabbits (Brachylagus idahoensis) in southwestern Wyoming: Northwest Naturalist, v. 79, no. 2, p. 72-74.
Katzner, T.E., Cruz, Y.P., 1998, Survival of the Polyembryonic Parasitoid Copidosomopsis tanytmema (Hymenoptera- Encyrtidae) in Envenomized Larvae of its Host Anagasta kuehniella (Lepidoptera- Pyralidae): Annals of the Entomological Society of America, v. 91, no. 6, p. 808-812.
Katzner, T.E., Parker, K.L., Hardegree, S.P., 1997, Metabolism and Thermal Response in Winter-Acclimatized Pygmy Rabbits (Brachylagus idahoensis): Journal of Mammalogy, v. 78, no. 4, p. 1053-1062.
Katzner, T.E., Parker, K.L., 1997, Vegetative Characteristics and Size of Home Ranges Used by Pygmy Rabbits (Brachylagus idahoensis) during Winter: Journal of Mammalogy, v. 78, no. 4, p. 1063-1072.

To request an interview, contact fresc_outreach@usgs.gov or call (541) 750-1030.

Filter Total Items: 43
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Linking Behavioral States to Landscape Features for Improved Conservation Management

Behavioral Change Point Analysis (BCPA) is a tool that analyzes changes in species’ movement and behavior.

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link

Predicted Climate-Induced Reductions in Scavenging in Eastern North America

Scavenging is an important function within ecosystems. Scavengers remove organic matter, reduce disease, stabilize food webs, and generally make...

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link

Yearly Temperature Fluctuations and Survey Speed Influence Road Counts of Wintering Raptors

Researchers examined data from 2,155 road surveys of raptors conducted from 2001–2018 by community scientists while participating in the Pennsylvania...

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link

Wildlife Mortality from Wind Turbines Scales with Energy Production

Older wind facilities are being “repowered,” which involves replacing smaller, closely spaced turbines with larger ones, more widely spaced.

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link

Eagle Fatalities are Reduced by Automated Curtailment of Wind Turbines

Collision-caused fatalities of animals at wind power facilities create a ‘green versus green’ conflict between wildlife conservation and renewable...

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link

Shared Functional Traits Explain Synchronous Long-Term Trends in Counts of Migratory Raptors

Assessing long-term trends in counts of species is important to understand the consequences of ongoing global environmental change. One approach to...

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link

Assessing Consequences of Human Activity on Wildlife Populations

Human activity sometimes stresses or kills individual animals. Most of the tools we have to address this problem are focused on those individuals. We...

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Evaluating a Rapid Field Assessment System for Anticoagulant Rodenticide Exposure of Raptors

Anticoagulant rodenticides are commonly used to control rodents; however, there is a risk of poisoning non-target species, especially predatory and...

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link

Diurnal Timing of Nonmigratory Movement by Birds

Birds optimize foraging either by minimizing energy loss through passive movement or by maximizing energetic gain through foraging.

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Illegal Killing of Non-Game Wildlife and Recreational Shooting in Conservation Areas

Illegal killing of non-game wildlife is a global yet poorly documented problem. 

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Online Reference: Birds of the World – Golden Eagles v 2.0

Birds of the World is a scientific resource that synthesizes information into species accounts for every avian species throughout the world. 

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Trade-Offs Migrant Grey-Faced Buzzards Face During Oceanic Crossings

Costs and consequences of bird migration are especially heightened during high-risk over-water travels. 

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Science and Products

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    USGS science for a changing world

    Interaction Between Alternative Energy Development and Raptors

    Energy production has become essential for modern society. At the same time, this process can have negative effects on wildlife and ecosystems. It is in the best interest of society and the environment to understand these effects and to manage and mitigate for them. Our team focuses on measuring how energy development influences birds of prey and learning how to minimize impacts.
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    Ecosystems, Energy & Wildlife, Wildlife Program, Forest and Rangeland Ecosystem Science Center
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    Interaction Between Alternative Energy Development and Raptors

    Energy production has become essential for modern society. At the same time, this process can have negative effects on wildlife and ecosystems. It is in the best interest of society and the environment to understand these effects and to manage and mitigate for them. Our team focuses on measuring how energy development influences birds of prey and learning how to minimize impacts.
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    USGS science for a changing world

    Conservation Ecology and Monitoring of Raptors

    Raptors, or birds of prey, are often used to indicate the state of an ecosystem, and monitoring their populations can help us to understand ecosystem processes. Raptors are particularly good animals for monitoring because they are big and therefore charismatic and easy to observe. Whether we’re monitoring nesting biology and reproductive output, counting individuals on roads, or setting up trail...
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    Ecosystems, Energy & Wildlife, Forest and Rangeland Ecosystem Science Center
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    Conservation Ecology and Monitoring of Raptors

    Raptors, or birds of prey, are often used to indicate the state of an ecosystem, and monitoring their populations can help us to understand ecosystem processes. Raptors are particularly good animals for monitoring because they are big and therefore charismatic and easy to observe. Whether we’re monitoring nesting biology and reproductive output, counting individuals on roads, or setting up trail...
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    USGS science for a changing world

    Bird Movement and Migration

    Migration is an amazing annual event. Every year billions of animals – birds, mammals, insects, and fish – make long-distance journeys from breeding grounds to wintering grounds. Most northern hemisphere birds migrate southward, but there are many other ways that birds move seasonally. If we want to protect birds that take these long distance journeys, we need to understand why they move, why they...
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    Ecosystems, Energy & Wildlife, Wildlife Program, Forest and Rangeland Ecosystem Science Center
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    Bird Movement and Migration

    Migration is an amazing annual event. Every year billions of animals – birds, mammals, insects, and fish – make long-distance journeys from breeding grounds to wintering grounds. Most northern hemisphere birds migrate southward, but there are many other ways that birds move seasonally. If we want to protect birds that take these long distance journeys, we need to understand why they move, why they...
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  • Data

    If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.

    Predictor, null model, response variable, and habitat suitability prediction rasters for a golden eagle hierarchical Bayesian synoptic model used for habitat selection in San Diego County, California. Derived from golden eagle data collected from November

    This data release includes three types of data used in habitat modeling, and predictions from the habitat models. (1) Predictor rasters for proportion urban development within 1-km radius, proportion exurban within 1-km radius, vector ruggedness measure (VRM) within 500-m radius, topographic position index (TPI) within 500-m radius. (2) Twenty-nine null models for space use for 29 different golden
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  • Publications

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    Filter Total Items: 88

    Linking behavioral states to landscape features for improved conservation management

    A central theme for conservation is understanding how animals differentially use, and are affected by change in, the landscapes they inhabit. However, it has been challenging to develop conservation schemes for habitat-specific behaviors.Here we use behavioral change point analysis to identify behavioral states of golden eagles (Aquila chrysaetos) in the Sonoran and Mojave Deserts of the southwest
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    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Endangered Australian top predator is frequently exposed to anticoagulant rodenticides

    Anticoagulant rodenticides (ARs) used to control mammalian pest populations cause secondary exposure of predatory species throughout much of the world. It is important to understand the drivers of non-target AR exposure patterns as context for assessing long-term effects and developing effective mitigation for these toxicants. In Australia, however, little is known about exposure and effects of AR
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    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Predicted climate-induced reductions in scavenging in eastern North America

    Scavenging is an important function within ecosystems where scavengers remove organic matter, reduce disease, stabilize food webs, and generally make ecosystems more resilient to environmental changes. Global change (i.e., changing climate and increasing human impact) is currently influencing scavenger communities. Thus, understanding what promotes species richness in scavenger communities can hel
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    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Golden Eagle

    The Golden Eagle inhabits a wide range of latitudes and habitats throughout the Palearctic and into northern Africa, where it is largely resident. In North America, its breeding distribution includes most of Canada and Alaska, as well as the western half of the United States and northern and western Mexico. Most eagles that nest in northern Canada and interior and northern Alaska migrate thousands
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    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Relative energy production determines effect of repowering on wildlife mortality at wind energy facilities

    Reduction in wildlife mortality is often cited as a potential advantage to repowering wind facilities, that is, replacing smaller, lower capacity, closely spaced turbines, with larger, higher capacity ones, more widely spaced. Wildlife mortality rates, however, are affected by more than just size and spacing of turbines, varying with turbine operation, seasonal and daily weather and habitat, all o
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    Ecosystems, Energy & Wildlife, Forest and Rangeland Ecosystem Science Center

    Eagle fatalities are reduced by automated curtailment of wind turbines

    Collision‐caused fatalities of animals at wind power facilities create a ‘green versus green’ conflict between wildlife conservation and renewable energy. These fatalities can be mitigated via informed curtailment whereby turbines are slowed or stopped when wildlife are considered at increased risk of collision. Automated monitoring systems could improve efficacy of informed curtailment, yet such
    By
    Ecosystems, Energy & Wildlife, Forest and Rangeland Ecosystem Science Center

    Yearly temperature fluctuations and survey speed influence road counts of wintering raptors

    Globally, evaluation of population trends is the most pressing research need for many species of conservation concern. Road counts for birds of prey are useful for monitoring long‐term population trends and examining year‐to‐year variations in abundance. We examined data from 2155 road surveys conducted from 2001 to 2018 by community scientists who recorded > 85 000 individuals of 14 species of ra
    By
    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Shared functional traits explain synchronous changes in long‐term count trends of migratory raptors

    AimAssessing long‐term shifts in faunal assemblages is important to understand the consequences of ongoing global environmental change. One approach to assess drivers of assemblage changes is to identify the traits associated with synchronous shifts in count trends among species. Our research identified traits influencing trends in 73 years of count data on migrating raptors recorded in the north‐
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    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Ecological insights from three decades of animal movement tracking across a changing Arctic

    The Arctic is entering a new ecological state, with alarming consequences for humanity. Animal-borne sensors offer a window into these changes. Although substantial animal tracking data from the Arctic and subarctic exist, most are difficult to discover and access. Here, we present the new Arctic Animal Movement Archive (AAMA), a growing collection of more than 200 standardized terrestrial and mar
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    Ecosystems, Western Ecological Research Center (WERC)

    Evaluating a rapid field assessment system for anticoagulant rodenticide exposure of raptors

    Anticoagulant rodenticides (ARs) are commonly used to control rodent pests. However, worldwide, their use is associated with secondary and tertiary poisoning of nontarget species, especially predatory and scavenging birds. No medical device can rapidly test for AR exposure of avian wildlife. Prothrombin time (PT) is a useful biomarker for AR exposure, and multiple commercially available point-of-c
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    Ecosystems, Eastern Ecological Science Center, Forest and Rangeland Ecosystem Science Center, Patuxent Wildlife Research Center

    Relative abundance of coyotes (Canis latrans) influences gray fox (Urocyon cinereoargenteus) occupancy across the eastern United States

    Gray fox (Urocyon cinereoargenteus (Schreber, 1775)) populations in portions of the eastern United States have experienced declines whose trajectories differ from those of other mesocarnivore populations. One hypothesis is that gray fox declines may result from interspecific interactions, particularly competition with abundant coyotes (Canis latrans Say, 1823). Alternatively, gray foxes may respon
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    Ecosystems, Forest and Rangeland Ecosystem Science Center

    High frequency of lead exposure in the population of an endangered Australian top predator, the Tasmanian wedge-tailed eagle (Aquila audax fleayi)

    Lead poisoning, mainly through incidental ingestion of lead ammunition in carcasses, is a threat to scavenging and predatory bird species worldwide. In Australia, shooting for animal control is widespread, and a range of native scavenging species are susceptible to lead exposure. However, the prevalence of lead exposure in Australia's scavenging and predatory birds is largely unknown. We evaluated
    By
    Ecosystems, Forest and Rangeland Ecosystem Science Center

    Pre-USGS Publications

    Katzner, T.E., Miller, T.A., Rodrigue, J.L., Shaffer, S., 2015, A Most Dangerous Game- Death and Injury to Birds from Porcupine Quills: Wilson Journal of Ornithology, v. 127, no. 1, p. 102-108, https://doi.org/10.1676/14-066.1.
    Behmke, S., Fallon, J.A., Duerr, A., Lehner, A., Buchweitz, J., Katzner, T.E., 2015, Chronic lead exposure is epidemic in obligate scavenger populations in eastern North America: Environment International, v. 79, p. 51-55, https://doi.org/10.1016/j.envint.2015.03.010.
    Duerr, A.E., Miller, T.A., Lanzone, M.J., Brandes, D., Cooper, J., O'Malley, K., Maisonnueve, C., Tremblay, J., Katzner, T.E., 2015, Flight response of slope-soaring birds to seasonal variation in thermal generation: Functional Ecology, v. 29, no. 6, p. 779-790, https://doi.org/10.1111/1365-2435.12381.
    Dennhardt, A.J., Duerr, A.E., Brandes, D., Katzner, T.E., 2015, Integrating citizen-science data with movement models to estimate the size of a migratory golden eagle population: Biological Conservation, v. 184, p. 68-78, https://doi.org/10.1016/j.biocon.2015.01.003.
    Morneau, F., Tremblay, J., Todd, C., Chubbs, T.E., Maisonnueve, C., Lemaıˆtre, J., Katzner, T.E., 2015, Known Breeding Distribution and Abundance of Golden Eagles in Eastern North America: Northeastern Naturalist, v. 22, no. 2, p. 236-247, https://doi.org/10.1656/045.022.0201.
    Miller, T.A., Brooks, R.P., Lanzone, M.J., Brandes, D., Cooper, J., Tremblay, J., Wilhelm, J., Duerr, A.E., Katzner, T.E., 2015, Limitations and mechanisms influencing the migratory performance of soaring birds: Ibis, v. 158, no. 1, p. 116-134, https://doi.org/10.1111/ibi.12331.
    Dennhardt, A.J., Duerr, A.E., Brandes, D., Katzner, T.E., 2015, Modeling autumn migration of a rare soaring raptor identifies new movement corridors in central Appalachia: Ecological Modelling, v. 303, p. 19-29, https://doi.org/10.1016/j.ecolmodel.2015.02.010.
    Katzner, T.E., Turk, P., Duerr, A.E., Miller, T.A., Lanzone, M.J., Cooper, J., Brandes, D., Tremblay, J., Lemaıˆtre, J., 2015, Use of multiple modes of flight subsidy by a soaring terrestrial bird, the golden eagle Aquila chrysaetos, when on migration: Journal of the Royal Society Interface, v. 12, no. 112, p. 20150530, https://doi.org/10.1098/rsif.2015.0530.
    Pettorelli, N., Evans, D.M., Garner, T.W., Katzner, T.E., Gompper, M.E., Altwegg, R., Branch, T.A., Johnson, J.A., Pollock, K., DaVolls, L., Rantanen, E., Gordon, I.J., 2013, Addressing gender imbalances in Animal Conservation: Animal Conservation, v. 16, p. 131-133, https://doi.org/10.1111/acv.12032.
    Katzner, T.E., Collar, N.J., 2013, Are insular populations of the Philippine falconet (Microhierax erythrogenys) steps in a cline?: The Condor, v. 115, no. 3, p. 576-583, https://doi.org/10.1525/cond.2013.120070.
    Latta, S.C., Musher, L.J., Latta, K.N., Katzner, T.E., 2013, Influence of human population size and the built environment on avian assemblages in urban green spaces: Urban Ecosystems, v. 16, no. 3, p. 463-479, https://doi.org/10.1007/s11252-012-0282-z.
    Sklyarenko, S.L., Katzner, T.E., 2012, The Status of Populations of Vultures in Kazakhstan In Kovshar, A.F., Rustamov, E.A., Mitropolsky, O.V., Levin, A.S., Kovshar, V.A., eds., Ornithological News of Kazakhstan and Middle Asia: ISBN 978-601-7287-05-4, Almaty, Kazakhstan, Menzbier’s Ornithological Society, p. 178-185.
    Katzner, T.E., Winton, J.D., McMorris, F.A., Brauning, D., 2012, Dispersal, Band Encounters, and Causes of Death in a Reintroduced and Rapidly Growing Population of Peregrine Falcons: Journal of Raptor Research, v. 46, no. 1, p. 75-83, https://doi.org/10.3356/JRR-10-93.1.
    Al Hasani, I.K., Azar, J.F., Nishimura, K., Amr, Z.S., Katzner, T.E., 2012, Distribution, diet and winter ecology of the Imperial Eagle Aquila heliaca in Jordan.: Vertebrate Zoology, v. 62, no. 2, p. 273-280.
    Borher, G., Brandes, D., Mandel, J., Bildstein, K.L., Miller, T., Lanzone, M., Katzner, T.E., Maissoneuve, C., Tremblay, J., 2012, Estimating updraft velocity components over large spatial scales- Contrasting migration strategies of golden eagles and turkey vultures: Ecology Letters, v. 15, no. 2, p. 96-103, https://doi.org/10.1111/j.1461-0248.2011.01713.x.
    Branch, T.A., Austin, J.D., Pollock, K., Gordon, I.J., Gompper, M.E., Katzner, T.E., Pettorelli, N., 2012, Fisheries conservation and management- finding consensus in the midst of competing paradigms: Animal Conservation, v. 15, no. 1, p. 1-3, https://doi.org/10.1111/j.1469-1795.2011.00502.x.
    Lanzone, M., Miller, T., Turk, P., Brandes, D., Halverson, C., Maissoneuve, C., Tremblay, J., Cooper, J., O'Malley, K., Brooks, R., Katzner, T.E., 2012, Flight responses by a migratory soaring raptor to changing meteorological conditions: Biology Letters, v. 8, no. 5, p. 710-713, https://doi.org/10.1098/rsbl.2012.0359.
    Evans, D.M., Barnard, P., Koh, L.P., Chapman, C.A., Altwegg, R., Garner, T.W., Gompper, M.E., Gordon, I.J., Katzner, T.E., Pettorelli, N., 2012, Funding nature conservation- who pays?: Animal Conservation, v. 15, no. 3, p. 215-216, https://doi.org/10.1111/j.1469-1795.2012.00550.x.
    Bragin, E., Katzner, T.E., 2012, Second nest record of Smew Mergus albellus in the Naurzum forest: Russian Ornithological Society: Express Issue, v. 21, no. 743, p. 724-725.
    Katzner, T.E., Smith, B.W., Miller, T.A., Brandes, D., Cooper, J., Lanzone, M., Brauning, D., Farmer, C., Harding, S., Kramer, D., Koppie, C., Maissoneuve, C., Martell, M., Mojica, E.K., Todd, C., Tremblay, J., Wheeler, M., Brinker, D.F., Chubbs, T.E., O'Malley, K., Mehus, S., Porter, B., Brooks, R.P., Watts, B.D., Bildstein, K.L., 2012, Status, biology and conservation priorities for North America’s eastern Golden Eagle (Aquila chrysaetos) population: Auk, v. 29, no. 1, p. 168-176, https://doi.org/10.1525/auk.2011.11078.
    Bragin, E., Katzner, T.E., Bragin, E., 2012, Summer accumulation of large birds of prey , and the problem of estimating their number - Proceedings Menzbirovskogo Ornithological Society: Volume I: Proceedings of XIII International Ornithological Conference of Northern Eurasia, p. 234-240.
    Duerr, A., Miller, T., Lanzone, M., Brandes, D., Cooper, J., O'Malley, K., Maissoneuve, C., Tremblay, J., Katzner, T.E., 2012, Testing an emerging paradigm in migration ecology shows surprising differences in efficiency between flight modes: PLOS ONE, v. 7, no. 4, p. e35548, https://doi.org/10.1371/journal.pone.0035548.
    Katzner, T.E., Wheeler, M., Negro, J.J., Kapetanakos, Y., DeWoody, J.A., Horvath, M., Lovette, I., 2012, To pluck or not to pluck- scientific methodologies should be carefully chosen, not “one size fits all": Journal of Avian Biology, v. 43, p. 15-17, https://doi.org/10.1111/j.1600-048X.2011.05592.x.
    Katzner, T.E., Brandes, D., Miller, T., Lanzone, M., Maissoneuve, C., Tremblay, J., Mulvihill, R., Merovich, G., 2012, Topography drives migratory flight altitude of golden eagles- implications for on-shore wind energy development: Journal of Applied Ecology, v. 49, no. 5, p. 1178-1186, https://doi.org/10.1111/j.1365-2664.2012.02185.x.
    Gordon, I.J., Pollock, K., Altwegg, R., Garner, T.W., Gompper, M.E., Katzner, T.E., Pettorelli, N., Redpath, S., 2012, What the ‘food security’ agenda means for animal conservation in terrestrial ecosystems: Animal Conservation, v. 15, no. 2, p. 115-116, https://doi.org/10.1111/j.1469-1795.2012.00541.x.
    Katzner, T.E., Ivy, J.R., Bragin, E., Milner-Gulland, E.J., DeWoody, J.A., 2011, Conservation implications of inaccurate estimation of cryptic population size: Animal Conservation, v. 14, no. 4, p. 328-332, https://doi.org/10.1111/j.1469-1795.2011.00444.x.
    Iverson, S.A., Gavrilov, A., Katzner, T.E., Takekawa, J., Newman, S., Miller, T., Hagemeijer, W., Sivananinthaperumal, B., Mundkur, T., DeMattos, C., Ahmed, L.S., 2011, Migratory movements of waterfowl in Central Asia and avian influenza emergence- sporadic transmission of H5N1 from east to west: Ibis, v. 153, no. 2, p. 279-292, https://doi.org/10.1111/j.1474-919X.2010.01095.x.
    Jones, J.P., Collen, B., Baxter, P.W., Bubb, P., Illian, J., Katzner, T.E., Keane, A., Loh, J., McDonald-Madden, E., Nicholson, E., Pereira, H., Possingham, H., Pullin, A., Rodrigues, A., Ruiz-Gutierrez, V., Sommerville, M., Milner-Gulland, E.J., 2011, The Why, What, and How of Global Biodiversity Indicators Beyond the 2010 Target: Conservation Biology, v. 25, no. 3, p. 450-457, https://doi.org/10.1111/j.1523-1739.2010.01605.x.
    Terraube, J., Arroyo, B.E., Mougeot, F., Katzner, T.E., Bragin, E., 2010, Breeding biology of the Montagu’s harrier (Circus pygargus) in north-central Kazakhstan: Journal of Ornithology, v. 151, no. 3, p. 713-722, https://doi.org/10.1007/s10336-010-0505-0.
    Rudnick, J.A., Katzner, T.E., DeWoody, J.A., 2009, Genetic Analyses of Noninvasively Collected Feathers Can Provide Insights into Avian Demography and Behavior In Aronoff, J.B., ed., Handbook of Nature Conservation: Hauppauge, NY, Nova Science Publishers, p. 181-197.
    Miller, T.M., Brandes, D., Lanzone, M., Ombalski, D., Maisonnueve, C., Katzner, T.E., 2009, Golden eagle migration and winter behavior in Pennsylvania In Majumdar, S.K., ed., Avian Ecology and Conservation: A Pennsylvania Focus with National Implications: Immaculata, PA, Pennsylvania Academy of Sciences, p. 111-125.
    Brandes, D., Miller, T.M., Katzner, T.E., 2009, Wind Power Mortality In Majumdar, S.K., ed., Avian Ecology and Conservation: A Pennsylvania Focus with National Implications: Immaculata, PA, Pennsylvania Academy of Sciences, p. 300-303.
    Rudnick, J.A., Katzner, T.E., Bragin, E.A., DeWoody, J.A., 2008, A non-invasive genetic evaluation of population size, natal philopatry, and roosting behavior of non-breeding eastern imperial eagles (Aquila heliaca) in central Asia: Conservation Genetics, v. 9, p. 667-676.
    Poulakakis, N., Antoniou, A., Mantziou, G., Parmakelis, A., Skartsi, T., Vasilakis, D., Elorriaga, J., De La Puente, J., Gavashelishvili, A., Ghasabyan, M., Katzner, T.E., McGrady, M.J., Batbayar, N., Fuller, M.R., Natsagdorj, T., 2008, Population structure, diversity, and phylogeography in the near-threatened Eurasian black vultures Aegypius monachus (Falconiformes; Accipitridae) in Europe- insights from microsatellite and mitochondrial DNA variation: Biological Journal of the Linnean Society, v. 95, p. 859-872.
    Kenward, R., Katzner, T.E., Wink, M., Marcström, V., Walls, S., Karlbom, M., Pfeffer, R., Bragin, E.A., Hodder, K., Levin, A.S., 2007, Rapid sustainability modelling for raptors by radio tagging and DNA fingerprinting: Journal of Wildlife Management, v. 71, no. 1, p. 238-245.
    Ryabtsev, V.V., Katzner, T.E., 2007, Severe declines of Eastern Imperial Eagle Aquila heliaca populations in the Baikal region, Russia- a modern and historical perspective: Bird Conservation International, v. 17, no. 03, p. 197-209.
    Rudnick, J.A., Katzner, T.E., Bragin, E.A., DeWoody, J.A., 2007, Species identification of birds through genetic analysis of naturally shed feathers: Molecular Ecology Notes, p. 757-762.
    Katzner, T.E., Milner-Gulland, E.J., Bragin, E.A., 2007, Using modeling to improve monitoring of structured populations- are we collecting the right data?: Conservation Biology, v. 21, no. 1, p. 241-252.
    Katzner, T.E., Bragin, E.A., Milner-Gulland, E.J., 2006, Modelling populations of long lived birds of prey for conservation- a study of Imperial Eagles (Aquila heliaca) in Kazakhstan: Biological Conservation, v. 132, no. 3, p. 322-335.
    Katzner, T.E., 2005, Corruption - a double-edged sword for conservation? A response to Smith and Walpole.: Oryx, v. 39, no. 3, p. 260-262.
    Katzner, T.E., Robertson, S., Robertson, B., Klucsarits, J., McCarty, K.M., Bildstein, K.L., 2005, Results from a long-term nest-box program for American Kestrels- implications for improved population monitoring and conservation: Journal of Field Ornithology, v. 76, no. 3, p. 217-318.
    Busch, J., Katzner, T.E., Bragin, E.A., Keim, P., 2005, Tetranucleotide microsatellites for aquila and haliaeetus eagles: Molecular Ecology Notes, v. 5, no. 1, p. 39-41.
    Rudnick, J.A., Katzner, T.E., Bragin, E.A., Rhodes, O.E., DeWoody, J.A., 2005, Using naturally shed feathers for individual identification, genetic parentage analyses, and population monitoring in an endangered Eastern imperial eagle (Aquila heliaca) population from Kazakhstan: Molecular Ecology, v. 14, no. 10, p. 2959-2967.
    Katzner, T.E., Hsun Lai, C., Gardiner, J.D., Foggin, J.M., Pearson, D., Smith, A.T., 2004, Adjacent nesting by Lammergeier Gypaetus barbatus and Himalayan Griffon Gyps himalayensis on the Tibetan Plateau, China: Forktail, v. 20, p. 94-96.
    Leppert, L.L., Layman, S., Bragin, E.A., Katzner, T.E., 2004, Survey for Hemoparasites in Imperial Eagles (Aquila heliaca), Steppe Eagles (Aquila nipalensis), and White-tailed Sea Eagles (Haliaeetus albicilla) from Kazakhstan: Journal of Wildlife Diseases, v. 40, no. 2, p. 316-319.
    Sharik, T.L., Katzner, T.E., Bragina, T.M., 2003, A new species of Copidosoma Ratzeburg (Hymenoptera- Encyrtidae) from eagle nests in Kazakhstan: Journal of Hymenoptera Research, v. 12, no. 2, p. 308-311.
    Pain, D.J., Cunningham, P.G., Donald, P.F., Duckworth, J.W., Houston, D.C., Katzner, T.E., Parry-Jones, J., Poole, C., Prakash, V., Round, P., Timmins, R., 2003, Causes and impacts of temporospatial declines of Gypsvultures in Asia: Conservation Biology, v. 17, no. 3, p. 661-671.
    Katzner, T.E., Parker, K.L., 1998, Long distance movements from established burrow sites by pygmy rabbits (Brachylagus idahoensis) in southwestern Wyoming: Northwest Naturalist, v. 79, no. 2, p. 72-74.
    Katzner, T.E., Cruz, Y.P., 1998, Survival of the Polyembryonic Parasitoid Copidosomopsis tanytmema (Hymenoptera- Encyrtidae) in Envenomized Larvae of its Host Anagasta kuehniella (Lepidoptera- Pyralidae): Annals of the Entomological Society of America, v. 91, no. 6, p. 808-812.
    Katzner, T.E., Parker, K.L., Hardegree, S.P., 1997, Metabolism and Thermal Response in Winter-Acclimatized Pygmy Rabbits (Brachylagus idahoensis): Journal of Mammalogy, v. 78, no. 4, p. 1053-1062.
    Katzner, T.E., Parker, K.L., 1997, Vegetative Characteristics and Size of Home Ranges Used by Pygmy Rabbits (Brachylagus idahoensis) during Winter: Journal of Mammalogy, v. 78, no. 4, p. 1063-1072.
  • News

    To request an interview, contact fresc_outreach@usgs.gov or call (541) 750-1030.

    Filter Total Items: 43
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    Linking Behavioral States to Landscape Features for Improved Conservation Management

    Behavioral Change Point Analysis (BCPA) is a tool that analyzes changes in species’ movement and behavior.

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    link

    Predicted Climate-Induced Reductions in Scavenging in Eastern North America

    Scavenging is an important function within ecosystems. Scavengers remove organic matter, reduce disease, stabilize food webs, and generally make...

    Read Article
    link

    Yearly Temperature Fluctuations and Survey Speed Influence Road Counts of Wintering Raptors

    Researchers examined data from 2,155 road surveys of raptors conducted from 2001–2018 by community scientists while participating in the Pennsylvania...

    Read Article
    link

    Wildlife Mortality from Wind Turbines Scales with Energy Production

    Older wind facilities are being “repowered,” which involves replacing smaller, closely spaced turbines with larger ones, more widely spaced.

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    link

    Eagle Fatalities are Reduced by Automated Curtailment of Wind Turbines

    Collision-caused fatalities of animals at wind power facilities create a ‘green versus green’ conflict between wildlife conservation and renewable...

    Read Article
    link

    Shared Functional Traits Explain Synchronous Long-Term Trends in Counts of Migratory Raptors

    Assessing long-term trends in counts of species is important to understand the consequences of ongoing global environmental change. One approach to...

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    link

    Assessing Consequences of Human Activity on Wildlife Populations

    Human activity sometimes stresses or kills individual animals. Most of the tools we have to address this problem are focused on those individuals. We...

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    link

    Evaluating a Rapid Field Assessment System for Anticoagulant Rodenticide Exposure of Raptors

    Anticoagulant rodenticides are commonly used to control rodents; however, there is a risk of poisoning non-target species, especially predatory and...

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    Diurnal Timing of Nonmigratory Movement by Birds

    Birds optimize foraging either by minimizing energy loss through passive movement or by maximizing energetic gain through foraging.

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    Illegal Killing of Non-Game Wildlife and Recreational Shooting in Conservation Areas

    Illegal killing of non-game wildlife is a global yet poorly documented problem. 

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    Online Reference: Birds of the World – Golden Eagles v 2.0

    Birds of the World is a scientific resource that synthesizes information into species accounts for every avian species throughout the world. 

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    Trade-Offs Migrant Grey-Faced Buzzards Face During Oceanic Crossings

    Costs and consequences of bird migration are especially heightened during high-risk over-water travels. 

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