Index Ornithologicus, Sive Systema Ornithologiae is a comprehensive ornithological index by John Latham, presenting a systematic classification of birds. Written in Latin, this Volume 1 meticulously divides birds into classes, orders, genera, and species, detailing their varieties and providing synonyms, locations, and descriptions. This foundational text offers invaluable insights into the ornithological knowledge of its time, making it an essential resource for historians of science and anyone interested in the early development of avian taxonomy and natural history. Latham's work remains a significant contribution to the field, reflecting the state of ornithological understanding during the period.

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