Birds have evolved to fit particular environments. Eggs have evolved along with the birds. The eggs that birds will lay this spring will vary in shape and color to facilitate successful hatching in a ...

A new study from the Smithsonian Tropical Research Institute (STRI) shows that red-eyed treefrog embryos hatch early when exposed to high ammonia levels — an environmental cue that it’s too hot and ...

Dear Pet Talk: I don’t have pets but keep active birdfeeders, so all the birds are my “pets in the wild.” Why do robins lay blue eggs? — Bird Lover Dear Bird Lover: I concur with you about wild birds ...

It’s important to remove adult lice and eggs that haven’t hatched before they can produce an even bigger infestation. It’s possible to prevent lice eggs from hatching if you treat or remove them at ...

WASHINGTON — Two chicks that recently hatched at the National Zoo in Washington are causing more than a peep among bird lovers. The two female blue-billed curassows, which are critically endangered, ...