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Cover title: Birds of eastern North America "With keys to the species and descriptions of their plumages, nests, and eggs, their distribution and migrations, and a brief account of their haunts and habits, with introductory chapters on the study of ornithology, how to identify birds, and how to collect and preserve birds, their nests, and eggs."
English: Full title: The code of nomenclature and check-list of North American birds adopted by the American Ornithologists' Union; being the report of the Committee of the Union on Classification and Nomenclature.
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Feathers are among the characteristics that distinguish the extant birds from other living groups. [188] Although feathers cover most parts of the body of birds, they arise only from certain well-defined tracts on the skin. They aid in flight, thermal insulation and waterproofing, with their colouration helping in communication and protection ...
The HBW and BirdLife International Illustrated Checklist of the Birds of the World is a checklist of the birds of the world published by Lynx Edicions in association with BirdLife International in two volumes in 2014 and 2016.
This article lists living orders and families of birds. In total there are about 11,000 species of birds described as of 2024, [1] though one estimate of the real number places it at almost 20,000. [2] The order passerines (perching birds) alone accounts for well over 5,000 species.
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Unlike hummingbirds which lay only 2 eggs per clutch and can live up to a dozen years or more, kinglets are (together with some small quails) the most r-selected birds alive, with clutch sizes of around 10 eggs, a maximum lifespan of merely around 5 years even in captivity, and an annual mortality of 80%.