The brown-headed cowbird (Molothrus ater) in North America is an obligate or generalist brood parasite of over 200 songbirds. Numerous studies show reproductive losses for individual host species (e.g ...

This data set concerns the possible effects of brood parasitism on the species composition of a songbird community. Your instructor will give you directions about using this file to make figures ...

Several people reported a strange sight at their feeders this past week. In all cases, a small bird was busily feeding a much larger begging bird. The smaller bird was indeed the parent. Unfortunately ...

Brown-headed cowbirds have shown up at my bird feeder a couple times over the last few weeks. Fleeting visits, they were there and then gone. I have always liked them because they seem so exotic - ...

This is the story of three bird species and how they interact. The brown-headed cowbird lays its eggs in other birds' nests and lets them raise its young -- often at the expense of the host's ...