Swifts: a guide to the swifts and treeswifts of the world.
london: Pica Press, (2000. second edition). Octavo, 24 colour plates, maps, fine copy in dustwrapper. The comprehensive text has a strong emphasis on identification and distribution, but also includes information on habitat, voice, habits and breeding. The species' descriptions are very detailed, range maps included for each species. More
