| buteo nesting ecology: evaluating nesting of swainson's hawks in the northern great plains. | swainson's hawks (buteo swainsoni) are long-distance migratory raptors that nest primarily in isolated trees located in areas of high grassland density. in recent years, anthropogenic conversion of grassland habitat has raised concerns about the status of the breeding population in the northern great plains. in 2013, we initiated a study to investigate the influence of extrinsic factors influencing swainson's hawk nesting ecology in north-central south dakota and south-central north dakota. usin ... | 2015 | 26327440 |