Costa RICA BEST Birding,
http://aoucospubs.org/doi/pdf/10.1642/AUK-15-73.1
http://aoucospubs.org/doi/pdf/10.1642/AUK-15-73.1
Cambios sorprententes en los Thraupidae
FELLOW BIRD GEEKS: get out your binoculars and life lists because the American Ornithologist Union has added some new species…
New paper by J.V. Remsen in The Auk. "Fifty-sixth Supplement to the American Ornithologists' Union: Check-list of North…