Over 3,100 species of bird, a third of the world's total, are resident or migrant in South America. This planned 4-volume work will, when completed, provide the most complete guide to this incredible avifauna. It is written and illustrated by two of the foremost authorities on neotropical ornithology, using extensive field observation and study of museum specimens. Each volume starts with brief chapters on migration and conservation. There then follows the colour plates, with brief notes on facing pages. The bulk of the book comprises the text, giving for each species a full description, similar species, habitat and behaviour, range, habits and voice, plus a distribution map. The first two volumes are now published, completing coverage of the Passerines.