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 ...

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.

Larger-bodied migratory birds are reproducing less, while sedentary species of small-bodied birds tend to produce more offspring under similar conditions, according to an international study focused ...