A Field Guide to Warblers of North America (Peterson Field Guides)
The Peterson Field Guides series has added another weapon to its considerable arsenal of bird-identification guidebooks: a field guide devoted solely to the warblers of North America. Warblers, those  small, sprightly, colorful songbirds that move north through the continent for the breeding season, have  always delighted and simultaneously frustrated birders around the country. This field guide won't cure any  cases of "warbler neck"--a condition brought on by extensive peering into the treetops--but it  will help you to better decide just which species has your craned-neck attention. With color plates  (including the "Peterson System" of arrows indicating important field marks), photographs,  distribution maps, and textual information on species description, habitat, behavior, song, plumage  variations, and migration patterns, this is an essential resource for birders.