Bird work

This handsome little devil is a male black-throated blue warbler (Dendroica caerulescens Gmelin). The species' breeding range in the U.S. and Canada is decidedly eastern and its winters are spent in the Caribbean. I've twitched several life birds during informal lunchtime bird walks along the Santa Cruz River near my office, but they were all species one would reasonably expect to see in the west. Having this particular bird turn up in urban Tucson was quite a surprise.