The long-held idea that birds living near the equator are more colorful than those living closer to the poles is true, suggests a recent study Paradise Tanager (Tangara chilensis). The sexes look ...

The 17,000th species to enter Nat Geo's Photo Ark The 17,000th species to enter Nat Geo's Photo Ark Bringing back the ‘most endangered bird’ in the U.S. Bringing back the ‘most endangered bird’ in the ...

Despite abundant evidence that natural populations are responding to climate change, there are few demonstrations of how extreme climatic events (ECEs) affect fitness. Climate warming increases ...

This is a preview. Log in through your library . Abstract The purpose of this study was to determine the normal fecal bacterial and fungal flora and parasite prevalence in wild passerine birds found ...

Competition for mates leads to a deeper voice than expected based on size. An analysis of the songs of most of the world's passerine birds reveals that the frequency at which birds sing mostly depends ...