Every spring, migratory birds arrive in the continental United States from south and central America to breed. But precisely when they arrive each spring varies from year to year. In a NASA-led study ...

CASTLE DANGER -- A quick flitter in the treetops, then a chirp or short song is all it takes to get Anna Peterson to make a mark on her clipboard. She pauses on her walk through the woods, checks her ...

For some birds, recognizing their own eggs can be a matter of life or death. In a new study, scientists have shown that many birds affected by the parasitic Common Cuckoo -- which lays its lethal ...

Though previous research has shown that bird populations are declining across North America, a new study is the first to show that the pace of loss has picked up speed since the mid-1980s in three ...

Research looks at the evolutionary pathways to differences in bird plumage patterns between males and females -- and concludes that birds are able to adapt their appearance with remarkable ease.

For some birds, recognising their own eggs can be a matter of life or death. Scientists have used imafe recognition technology to show that birds defending their nests against the Common Cuckoo - ...