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Full-Text Articles in Social and Behavioral Sciences
Habitat And Nesting Of Le Conte's Sparrows In The Northern Tallgrass Prairie, Maiken Winter, Jill A. Shaffer, Douglas H. Johnson, Therese M. Donovan, W. Daniel Svedarsky, Peter W. Jones, Betty R. Euliss
Habitat And Nesting Of Le Conte's Sparrows In The Northern Tallgrass Prairie, Maiken Winter, Jill A. Shaffer, Douglas H. Johnson, Therese M. Donovan, W. Daniel Svedarsky, Peter W. Jones, Betty R. Euliss
USGS Northern Prairie Wildlife Research Center
ABSTRACT. Little is known about the breeding biology of the Le Conte's Sparrow (Ammodramus leconteil), probably because of its secretive nature. We provide new information on several aspects of Le Conte's Sparrow breeding biology, including rates of nest parasitism by Brown-headed Cowbirds (Molothrus ater) and potential factors affecting breeding densities and nesting success of the species. Our study was conducted in the tallgrass prairie of northwestern Minnesota and southeastern North Dakota during 1998-2002. Breeding densities varied among years, but this variation was not clearly linked to climatic patterns. Vegetation had some influence on densities of Le …
Dramatic Increase Of Le Conte's Sparrow In Conservation Reserve Program Fields In The Northern Great Plains, Lawrence D. Igl, Douglas H. Johnson
Dramatic Increase Of Le Conte's Sparrow In Conservation Reserve Program Fields In The Northern Great Plains, Lawrence D. Igl, Douglas H. Johnson
USGS Northern Prairie Wildlife Research Center
During a continuing investigation in the northern Great Plains, we documented substantial increases of the Le Conte's Sparrow (Ammodramus Leconteii) in Conservation Reserve Program (CRP) fields in 1994 compared with 1990-93. The most dramatic increases occurred in Eddy County, North Dakota, and Sheridan County, Montana. The changes in habitat associated with the drought from 1989 to early 1993 and above-normal precipitation from mid-1993 through mid-1994 likely produced favorable breeding conditions for this species in CRP fields in 1994.