Brown-headed Cowbirds (Molothrus ater) are brood parasites that lay their eggs in the nests of host species. Cowbird chicks typically grow up in mixed broods consisting of one or more cowbird chicks ...

The brown-headed cowbird is a species common throughout the United States and doesn’t build its own nest. It uses other birds’ nests to raise their baby birds. The brown-headed cowbird got its ...

The complexity of nature is sometimes hard to understand and even harder to justify or feel good about, especially when seen through the human lens. I was reminded of this the other day while ...

Although each cowbird female only lays one egg in a nest, a high abundance of cowbirds in an area often will lead to many ...

Brood parasite, lays eggs in other birds’ nests. A female cowbird may lay as many as 40 eggs during the nesting season. Eggs are white with brown spots and are usually larger than host eggs. Female ...

Discuss. 3. In other studies researchers have found that cowbird predation did reduce numbers of songbirds living in forest fragments. Why might their findings be different from those of De Groot and ...