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| | Auk, The: Identification Guide to North American Birds. Part 1. Columbidae through Ploceidae |
 | | In addition, much of our improved understanding of molts and plumages, mainly of near-passerines and tyrannids, and of their relationships to age and sex, is due to insights gained by Pyle and his colleagues from more than 1,000 hours of work examining more than 9,000 nonpasserine and 16,000 passerine study skins of 288 species. |
 | | Each family is preceded by a brief but very useful summary of general physical attributes of the family, with particular reference to aging, sexing, and molts and plumages. |
 | | In addition, Pyle has added excellent new sections on: (1) incomplete molts and aging in near-passerines, owls, and woodpeckers; (2) identifying, aging, and sexing small hummingbirds; and (3) molt limits in North American passerines. |
| www.findarticles.com /p/articles/mi_qa3793/is_199810/ai_n8808882 (1262 words) |
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