Birds of South Asia: The Ripley Guide by Pamela C. Rasmussen and John C. Anderton is a two-volume ornithological handbook, covering the birds of South Asia, published in 2005 (second edition in 2012) by the Smithsonian Institution and Lynx Edicions. The geographical scope of the book covers India, Bangladesh, Pakistan, Sri Lanka, Nepal, Bhutan, Maldives, the Chagos Archipelago and Afghanistan (the latter country had been excluded from previous works covering this region). In total, 1508 species are covered (this figure includes 85 hypothetical and 67 'possible' species, which are given only shorter accounts). Two notable aspects of Birds of South Asia are its distribution evidence-base — the book's authors based their distributional information almost completely on museum specimens — and its taxonomic approach, involving a large number of species-level splits. Source: Wikipedia (en)