File:Bird lore (1903) (14750800595).jpg

Identifier: birdlore51903nati (find matches)
Title: Bird lore
Year: 1899 (1890s)
Authors: National Committee of the Audubon Societies of America National Association of Audubon Societies for the Protection of Wild Birds and Animals National Audubon Society
Subjects: Birds Birds Ornithology
Publisher: New York City : Macmillan Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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OF KILLDEER, A PR^COCIAL BIRD (Meridian, N. Y.. June 7, 1898) question we are brought very near to an attempt to determine the originof birds nests. In a rough classification we may place birds in two groups: first,those whose young leave the nest the day they are hatched; second,those whose young are reared in the nest. Birds of the first class aretermed praecocial; those of the second, altricial. Compare the newlyhatched young of a Grouse with those of a Robin, and we have twoadmirable examples of praecocialism and altricialism. 92 Bird-Lore All praecocial birds are hatched with a growth of downy featherswhich, when they are dry, practically cover their body.Most altricial birds are born essentially naked and do notleave the nest until they have acquired the nestling orJuvenal plumage. There are, however, numerous excep-tions to this statement. For example, many species of the family Alcidae(Puffins, Murrelets, etc.), the Petrels, Herons, Hawks and Owls are Condition ofYoung atBirth
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