Add Yahoo as a preferred source to see more of our stories on Google. Cowbird eggs in a house finch nest, courtesy Lindsay Arnold Chipping sparrow nests are known to be parasitized by brown-headed ...

European cuckoos lay very different eggs depending on the host species. Genetic analyses have revealed how this adaptation is inherited without leading to speciation. Bright blue, white, greenish, ...

Nesting season is not done yet! Learn the bird nesting basics of these late nesters and find out how to attract them to your yard.

An international team of ornithologists has overturned one of the oldest assumptions in natural history by directly documenting how common cuckoos lay their eggs in host nests located inside cavities.

With spring well past sprung and summer almost here, baby critters of all types, from deer and rabbits to fledgling songbirds, may be visiting your yard. Maybe you’ve even spotted a nest or two. And ...

Q. Do brown-headed cowbirds pick the nest of another bird to lay eggs in based on which kind of bird raised them as a nestling? In other words, if a cowbird is raised as a chick by a red-winged ...

Q. Do brown-headed cowbirds pick the nest of another bird to lay eggs in based on which kind of bird raised them as a nestling? In other words, if a cowbird is raised as a chick by a red-winged ...

A George Mason University (GMU) biologist proposed an alternate theory of how the common cuckoo bird mimics other birds’ egg colorings at a biology department seminar Jan. 15. Hanley said cuckoos are ...

Female brown-headed cowbirds lay eggs in other birds' nests. Find out what you should do if you see cowbird eggs.

Do Birds Only Lay Eggs in Spring? Female cardinal feeding babies in the nest. Bird nesting happens in spring. That's common knowledge, right? Actually, it's not always the case. Even though we ...