Sam Droege
Sam is a Wildlife Biologist at the Eastern Ecological Science Center in Laurel, MD.
Sam has coordinated the North American Breeding Bird Survey Program, developed the North American Amphibian Monitoring Program, the BioBlitz, Cricket Crawl, and FrogwatchUSA programs and worked on the design and evaluation of monitoring programs. Currently he is developing an inventory and monitoring program for native bees, online identification guides for North American bees at discoverlife.org, and reviving the North American Bird Phenology Program.
Education and Certifications
M.S. from State University of New York – Syracuse
B.S. from University of Maryland
Science and Products
Filter Total Items: 71
A citywide breeding bird survey for Washington, DC
`DC Birdscape' was initiated in 1993 to systematically count the birds occurring throughout Washington D.C. during the breeding season. It involved a coordinated planning effort and partnership between the Audubon Naturalist Society, the National Park Service, and the National Biological Survey, and engaged the participation of more than 100 volunteers. A method for rapidly assessing the status
Authors
J. Hadidian, J.R. Sauer, C. Swarth, P. Handly, Sam Droege, C. Williams, J. Huff, G. Didden
A heuristic approach to validating monitoring programs based on count indices (damn the statisticians, full speed ahead)
No abstract available.
Authors
Sam Droege
Next steps for the North American Amphibian Monitoring Program
No abstract available.
Authors
Sam Droege
Monitoring Bird Populations by Point Counts
No abstract available.
The Summer Atlas of North American Birds
The North American Breeding Bird Survey comprises a network of regularly censussed, road-based survey routes and constitutes the most comprehensive set of data on the relative abundance and population trends of these birds during the summer months. Its value was highlighted in 1989, when the data were used to confirm suspected population declines in a number of species of neotropical migrants bree
Authors
J. Price, Sam Droege, A. Price
Statistical aspects of point count sampling
The dominant feature of point counts is that they do not census birds, but instead provide incomplete counts of individuals present within a survey plot. Considering a simple model for point count sampling, we demon-strate that use of these incomplete counts can bias estimators and testing procedures, leading to inappropriate conclusions. A large portion of the variability in point counts is cau
Authors
R. J. Barker, J.R. Sauer
Mapping of bird distributions from point count surveys
Maps generated from bird survey data are used for a variety of scientific purposes, but little is known about their bias and precision. We review methods for preparing maps from point count data and appropriate sampling methods for maps based on point counts. Maps based on point counts can be affected by bias associated with incomplete counts, primarily due to changes in proportion counted as a
Authors
J.R. Sauer, G.W. Pendleton, Sandra Orsillo
Managing and monitoring birds using point counts: Standards and applications
No abstract available.
Authors
C.J. Ralph, Sam Droege, J.R. Sauer
Mourning dove population trend estimates from Call-Count and North American Breeding Bird Surveys
The mourning dove (Zenaida macroura) Callcount Survey and the North American Breeding Bird Survey provide information on population trends of mourning doves throughout the continental United States. Because surveys are an integral part of the development of hunting regulations, a need exists to determine which survey provides precise information. We estimated population trends from 1966 to 198
Authors
J.R. Sauer, D.D. Dolton, Sam Droege
Distribution and abundance of birds wintering in Maryland, 1988-1993
A winter bird survey was conducted throughout Maryland, primarily by volunteers, during the 6 winters of 1988 to 1993 between the dates of 10 Jan and 10 Feb. The state of Maryland is covered by 1231 blocks (9.5 sq. miles each), each comprising one-sixth of the standard U.S.G.S. 7.5 minute topographic quadrangle, and 548 of these blocks (44.5%) were surveyed for winter birds. Blocks were chosen i
Authors
J. S. Hatfield, S.A. Ricciardi, G.A. Gough, D. Bystrak, Sam Droege, C.S. Robbins
Science and Products
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Filter Total Items: 71
A citywide breeding bird survey for Washington, DC
`DC Birdscape' was initiated in 1993 to systematically count the birds occurring throughout Washington D.C. during the breeding season. It involved a coordinated planning effort and partnership between the Audubon Naturalist Society, the National Park Service, and the National Biological Survey, and engaged the participation of more than 100 volunteers. A method for rapidly assessing the statusAuthorsJ. Hadidian, J.R. Sauer, C. Swarth, P. Handly, Sam Droege, C. Williams, J. Huff, G. DiddenA heuristic approach to validating monitoring programs based on count indices (damn the statisticians, full speed ahead)
No abstract available.AuthorsSam DroegeNext steps for the North American Amphibian Monitoring Program
No abstract available.AuthorsSam DroegeMonitoring Bird Populations by Point Counts
No abstract available.The Summer Atlas of North American Birds
The North American Breeding Bird Survey comprises a network of regularly censussed, road-based survey routes and constitutes the most comprehensive set of data on the relative abundance and population trends of these birds during the summer months. Its value was highlighted in 1989, when the data were used to confirm suspected population declines in a number of species of neotropical migrants breeAuthorsJ. Price, Sam Droege, A. PriceStatistical aspects of point count sampling
The dominant feature of point counts is that they do not census birds, but instead provide incomplete counts of individuals present within a survey plot. Considering a simple model for point count sampling, we demon-strate that use of these incomplete counts can bias estimators and testing procedures, leading to inappropriate conclusions. A large portion of the variability in point counts is cauAuthorsR. J. Barker, J.R. SauerMapping of bird distributions from point count surveys
Maps generated from bird survey data are used for a variety of scientific purposes, but little is known about their bias and precision. We review methods for preparing maps from point count data and appropriate sampling methods for maps based on point counts. Maps based on point counts can be affected by bias associated with incomplete counts, primarily due to changes in proportion counted as aAuthorsJ.R. Sauer, G.W. Pendleton, Sandra OrsilloManaging and monitoring birds using point counts: Standards and applications
No abstract available.AuthorsC.J. Ralph, Sam Droege, J.R. SauerMourning dove population trend estimates from Call-Count and North American Breeding Bird Surveys
The mourning dove (Zenaida macroura) Callcount Survey and the North American Breeding Bird Survey provide information on population trends of mourning doves throughout the continental United States. Because surveys are an integral part of the development of hunting regulations, a need exists to determine which survey provides precise information. We estimated population trends from 1966 to 198AuthorsJ.R. Sauer, D.D. Dolton, Sam DroegeDistribution and abundance of birds wintering in Maryland, 1988-1993
A winter bird survey was conducted throughout Maryland, primarily by volunteers, during the 6 winters of 1988 to 1993 between the dates of 10 Jan and 10 Feb. The state of Maryland is covered by 1231 blocks (9.5 sq. miles each), each comprising one-sixth of the standard U.S.G.S. 7.5 minute topographic quadrangle, and 548 of these blocks (44.5%) were surveyed for winter birds. Blocks were chosen iAuthorsJ. S. Hatfield, S.A. Ricciardi, G.A. Gough, D. Bystrak, Sam Droege, C.S. Robbins - Web Tools
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