Spatiotemporal Patterns in Nest Box Occupancy by Tree Swallows Across North America

Avian Conservation and Ecology

DaveShutler,¹  David W. Winkler,²  David J. T. Hussell,³  Raleigh J. Robertson,⁴  D.R. Norris,⁵ 

[1] Acadia University, Canada;Cornell University, U.S.A.;Ontario Ministry of Natural Resources, Canada;Queen;University of Guelph

关键词: avian aerial insectivore;    migrant;    nest boxes;    North American Breeding Bird Survey;    population trends;    Tree Swallow;   

DOI  :  10.5751/ACE-00517-070103

学科分类：社会科学、人文和艺术（综合）

来源: Resilience Alliance Publications

【 摘 要 】

Data from the North American Breeding Bird Survey (BBS) suggest that populations of aerial insectivorous birds are declining, particularly in northeastern regions of the continent, and particularly since the mid-1980s.Species that use nest boxes, such as Tree Swallows (Tachycineta bicolor), may provide researchers with large data sets that better reveal finer-scale geographical patterns in population trends.We analyzed trends in occupancy rates for ca. 40,000 Tree Swallow nest-box-years from 16 sites across North America.The earliest site has been studied intensively since 1969 and the latest site since 2004.Nest box occupancy rates declined significantly at five of six (83%) sites east of -78

【 授权许可】

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