In this book, ornithologists Charles G. Sibley and Burt L. Monroe Jr, present descriptions of the geographic distributions, and comments about the species-level taxonomy, of the living birds of the world. The accounts of the 9672 species are arranged according to the classification developed by Sibley, Monroe, and Ahlquist. The authors provide new information on the distribution of each species; an appendix includes 24 maps and a gazetteer of the place names mentioned in the text. This volume also provides a cross-referenced index of scientific and English bird names of species.

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