They are among North America’s most numerous invasive birds. They’re glossy greenish ... tundra and trumpeter swans by its ...

Black swifts, with their preference for nesting on steep, wet, cold rock faces, are among the most enigmatic birds in North America. JT Thomas On a hot, dry July evening, a dentist named Mike ...

Birds are rapidly vanishing from North America, with dramatic population losses in places that were once thought safe.

Often taken for granted, the brightly plumaged male summer tanager is one of the more spectacular breeding birds of North America ... generally mustard yellow-orange, with greener wings and ...

Multicolored birds were developed over centuries of near domestication. Polytypic (12 ssp.; nominate in North ... iris orange to red; orbital skin blue-gray; bill grayish black; and feet dark ...