US Geological Survey
Date of this Version
2003
Abstract
I observed a male Brown-headed Cowbird (Molothrus ater) attack and kill a nestling of an unidentified passerine in a grassland field in Day County, South Dakota, in June 2000. The killing or removal of nestlings by female cowbirds has been reported by others, but this behavior has not been documented previously in male cowbirds.
Comments
Published in The Wilson Bulletin Vol. 115, No. 2, June 2003.