Princeton: Princeton University Press, 2013. Octavo, colour photographs, minor blemishes, paperback.

With an array of seasonal plumages and distinctive yet oft-confused calls and songs, warblers are among the most challenging birds to identify. This guide enables you to quickly identify any of the 56 species of warblers in the United States and Canada. This groundbreaking guide features over 1,000 stunning colour photographs, extensive species accounts with multiple viewing angles and direct comparisons of plumage and vocalizations with similar species. Introduces an entirely new system of vocalization analysis that helps you effectively learn songs and calls.