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The effects of management practices on grassland birds—Rates of Brown-headed Cowbird (Molothrus ater) parasitism in nests of North American grassland birds 科技报告
报告编号: 70203495, 页数: 32, 2019
作者:  Shaffer, Jill A. jshaffer@usgs.gov;  Igl, Lawrence D. ligl@usgs.gov;  Johnson, Douglas H.
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The influence of local- and landscape-level factors on wetland breeding birds in the Prairie Pothole Region of North and South Dakota 科技报告
报告编号: 70189793, 页数: 72, 2017
作者:  Igl, Lawrence D. ligl@usgs.gov;  Shaffer, Jill A. jshaffer@usgs.gov;  Johnson, Douglas H. douglas_h_johnson@usgs.gov;  Buhl, Deborah A. dbuhl@usgs.gov
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Northern Prairie Wildlife Research Center—Celebrating 50 years of science 科技报告
报告编号: 70190185, 页数: 40, 2017
作者:  Austin, Jane E. jaustin@usgs.gov;  Shaffer, Terry L. tshaffer@usgs.gov;  Igl, Lawrence D. ligl@usgs.gov;  Johnson, Douglas H. douglas_h_johnson@usgs.gov;  Krapu, Gary L. gkrapu@usgs.gov;  Larson, Diane L. dlarson@usgs.gov;  Mech, L. David david_mech@usgs.gov;  Mushet, David M. dmushet@usgs.gov;  Sovada, Marsha A. msovada@usgs.gov
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