In fact, social monogamy is extremely common in birds and somewhat common in mammals, while sexual monogamy is vanishingly ...

All species of cowbirds are obligate brood parasites. “That is a fancy way of saying that they never build nests and are ...

Brood parasitic birds lay their eggs in the nests of others, sparing themselves the expense of rearing their own young. The resulting coevolutionary arms race includes sophisticated defenses by ...

Cowbird brood parasitism can further affect species that are considered threatened or endangered due to anthropogenic land uses. Historically, cowbirds have often been culled without addressing ...

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 ...

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 ...

some parasitic species, such as Clamator cuckoos, Vidua finches, and Molothrus cowbirds, seem to tolerate the presence of other nestlings. And new findings published this week in Science show that ...