The 64th Supplement to the American Ornithological Society’s (AOS) Check-list of North American Birds, published today in Ornithology, includes numerous updates to the classification of North American ...

This spring and summer, I’ve been exploring many of the migratory birds that visit us during the nesting season, including the swallows, our summer warblers and three diverse members of the cardinal ...

Empidonax birds, called empids for short, include Acadian, gray, Hammond’s, willow, dusky, Pacific slope and Cordilleran flycatchers, the latter two formerly combined as the Western flycatcher.