Lawrence Igl, PhD
Larry Igl is a Research Ecologist at the USGS Northern Prairie Wildlife Research Center in Jamestown, North Dakota.
His research interests are avian ecology and conservation, with an emphasis on grassland, wetland, and agricultural ecosystems in the Midwest and Great Plains. Specific areas of interest include avian responses to habitat management and disturbances, Farm Bill and agriculture programs, grassland bird ecology, cowbird brood parasitism, and nesting ecology. He has conducted surveys of breeding, migrating, and wintering birds throughout the southern, central, and northern Great Plains. Recent investigations include a long-term evaluation of breeding bird communities in grasslands enrolled in the Conservation Reserve Program in North Dakota, South Dakota, Minnesota, and Montana; an eco-immunology study of New World Blackbirds; a study relating wetland management to mercury in songbirds and ducks; an evaluation of the effects of livestock stocking rates on breeding birds in grasslands managed by the U.S. Forest Service; and an investigation of the response of grassland birds to adaptive management treatments that are being used to restore floristic composition of native grasslands owned by the U.S Fish and Wildlife Service.
Professional Experience
2010-present. Research Ecologist, Northern Prairie Wildlife Research Center, U.S. Geological Survey, Jamestown, ND
1992–2010. Ecologist, Northern Prairie Wildlife Research Center, U.S. Geological Survey, Jamestown, ND
Education and Certifications
Ph.D., Zoology, North Dakota State University, Fargo, ND
M.S., Animal Ecology, Iowa State University, Ames, IA
B.S., Triple major (Biology, Wildlife Ecology, and Natural Resources Management), University of Wisconsin, Stevens Point, WI
Science and Products
Area requirements of grassland birds: A regional perspective
On the rarity of observations of food provisioning by male dickcissels
Effects of management practices on grassland birds: Horned Lark
Effects of management practices on grassland birds: Swainson's Hawk
Effects of management practices on grassland birds: Vesper Sparrow
Effects of management practices on grassland birds: Field Sparrow
[Book review] Range Plant Identification, by United States Forest Service
Effects of management practices on grassland birds: Lark Bunting
Effects of management practices on grassland birds: Lark Sparrow
Effects of management practices on grassland birds: Long-billed Curlew
Effects of management practices on grassland birds: McCown's Longspur
Le Conte's sparrows breeding in Conservation Reserve Program fields: precipitation and patterns of population change
Science and Products
- Science
- Data
- Multimedia
- Publications
Filter Total Items: 118
Area requirements of grassland birds: A regional perspective
Area requirements of grassland birds have not been studied except in tallgrass prairie. We studied the relation between both species-occurrence and density and patch size by conducting 699 fixed-radius point counts of 15 bird species on 303 restored grassland areas in nine counties in four northern Great Plains states. Northern Harrier (Circus cyaneus), Sedge Wren (Cistothorus platensis), Clay-colAuthorsDouglas H. Johnson, Lawrence D. IglOn the rarity of observations of food provisioning by male dickcissels
Males of polygynous bird species typically provide less parental care to their offspring than males of monogamous species (Ketterson and Nolan 1994). Generally, in polygynous species, a male forfeits some potential reproductive success if he shifts his reproductive effort from mating with multiple females to parental care (Trivers 1972, Gubemick et al. 1993, Schleicher et al. 1993). In the polygynAuthorsL.D. Igl, Louis B. BestEffects of management practices on grassland birds: Horned Lark
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated, the maps aAuthorsMeghan F. Dinkins, Amy L. Zimmerman, Jill A. Dechant, Barry D. Parkin, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Betty R. EulissEffects of management practices on grassland birds: Swainson's Hawk
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated, the maps aAuthorsJill A. Dechant, Meghan F. Dinkins, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Betty R. EulissEffects of management practices on grassland birds: Vesper Sparrow
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated, the maps aAuthorsJill A. Dechant, Meghan F. Dinkins, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Betty R. EulissEffects of management practices on grassland birds: Field Sparrow
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated, the maps aAuthorsJill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Barry D. Parkin, Betty R. Euliss[Book review] Range Plant Identification, by United States Forest Service
Review of: Range plant identification. United States Forest Service, Pacific Northwest Region. 1979. Washington, D.C.AuthorsL.D. IglEffects of management practices on grassland birds: Lark Bunting
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated, the maps aAuthorsJill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Amy L. Zimmerman, Betty R. EulissEffects of management practices on grassland birds: Lark Sparrow
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated, the maps aAuthorsJill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Barry D. Parkin, Betty R. EulissEffects of management practices on grassland birds: Long-billed Curlew
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated, the maps aAuthorsJill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Paul A. Rabie, Betty R. EulissEffects of management practices on grassland birds: McCown's Longspur
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated, the maps aAuthorsJill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Paul A. Rabie, Betty R. EulissLe Conte's sparrows breeding in Conservation Reserve Program fields: precipitation and patterns of population change
The climate of the North American Great Plains is highly dynamic, with great year-to-year variability in precipitation and periodic, often extreme, wet and dry cycles (Bragg 1995). Drought is a major force of ecological disturbance on the Great Plains and has played a key role in directing the evolution of the grassland biota of this region (Knopf and Samson 1997). Although grassland birds may difAuthorsLawrence D. Igl, Douglas H. Johnson