Because cowbird eggs require a shorter incubation ... are listed as endangered due to loss of habitat and nest parasitism by brown-headed cowbirds. Conservation efforts to protect the Kirtland's ...

The Brown-headed cowbird is one of two cowbird species in North America. Both species are brood parasites - they lay their eggs in the nests of other birds. Brown-headed cowbirds are native to ...

Brown-headed Cowbirds seem to rely on a combination ... Davis, S. K. & Sealy, S. G. Cowbird parasitism and nest predation in fragmented grasslands of southwestern Manitoba. In Ecology and ...

The common brown-headed cowbird is the most widespread brood parasite in North America. Poly­typic. Length 7.5". A smallish, compact and stocky blackbird with a short and thick-based bill ...

Although half the known brood parasites—birds that lay their eggs in other ... And new findings published this week in Science show that brown-headed cowbird chicks actually grow fastest when they ...