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Nesting Productivity, Food Habits, and Nest Sites of Bald Eagles in Colorado and Southeastern Wyoming
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Nesting Productivity, Food Habits, and Nest Sites of Bald Eagles in Colorado and Southeastern Wyoming

著者: Mary L Kralovec; Richard L Knight; Gerald R Craig; Robert G McLean
版本/格式: 文章 文章 : 英语
刊登在:The Southwestern Naturalist, Dec., 1992, vol. 37, no. 4, p. 356-361
数据库:JSTOR
提要:
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文件类型: 文章
所有的著者/提供者: Mary L Kralovec; Richard L Knight; Gerald R Craig; Robert G McLean
ISSN:0038-4909
OCLC号码: 482286948
语言注释: English
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摘要:

A spatially-isolated population of approximately 16 nesting pairs of bald eagles (Haliaeetus leucocephalus) in Colorado and southeastern Wyoming was studied from 1981 to 1989. Reproductive success was 63% with 1.21 young fledged/occupied territory. Two hundred thirty-seven prey items, representing three vertebrate classes, were identified from food remains within or beneath nests. Mammals were the most important prey category, both in terms of prey numbers and total biomass. Nest trees were significantly taller and larger than randomly-chosen trees. Forest stands containing nest trees varied from old-growth ponderosa pine (Pinus ponderosa) to narrow strips of riparian vegetation surrounded by rangeland.

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