The Winter Ecology of the Rough-legged Hawk (Buteo Lagopus). PDF Download
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Author: Gary D. Schnell
Publisher:
ISBN:
Category : Hawks
Languages : en
Pages : 112
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Book Description
Author: Gary D. Schnell
Publisher:
ISBN:
Category : Hawks
Languages : en
Pages : 112
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Book Description
Author: Edwin Roy Smith
Publisher:
ISBN:
Category : Hawks
Languages : en
Pages : 158
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Author: Chad V. Olson
Publisher:
ISBN:
Category : Hawks
Languages : en
Pages : 386
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Author: Douglas John Eno
Publisher:
ISBN:
Category : Hawks
Languages : en
Pages : 148
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Book Description
Author: Genevieve C. Rozhon
Publisher:
ISBN:
Category : Rough-legged hawk
Languages : en
Pages : 108
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Book Description
The rough-legged hawk (Buteo lagopus sanctijohannis) is one of the most under-studied raptor species in North America. As a species that exhibits reversed sexual dimorphism, sex-specific habitat preferences may exist. To investigate rough-legged hawk sex-specific habitat selection preferences, we equipped 17 rough-legged hawks (n = eight females, nine males) with GPS backpacks on their wintering grounds (n = six study areas) during the winter months of 2014 and 2015 in five states in western North America. I analyzed rough-legged hawk habitat selection in relation to sex at four spatial scales: nocturnal roosting site, 50% core range, 95% winter range, and 200% ecoregion range. Habitat selection variables included land cover, patch size, terrain ruggedness, indicators of anthropogenic disturbance, and measures of interspecific competition. Species and sex-specific preferences existed at each spatial scale, suggesting that hawks balanced competition for roosting and foraging habitat against prey availability and anthropogenic sources of disturbance when selecting habitat. At each spatial scale, female hawks preferentially selected for high quality habitat, while male rough-legged hawks used high as well as lower quality habitat (qualified by the presence of perching structures, human disturbance, and prey catchability). I posit that reversed sexual dimorphism in rough-legged hawks leads to social dominance of female hawks on their wintering grounds and that females may outcompete males for higher quality foraging habitat.
Author: James Robert Byrne
Publisher:
ISBN:
Category : Hawks
Languages : en
Pages : 210
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Author:
Publisher:
ISBN:
Category : Ecology
Languages : en
Pages : 462
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Author: Tom J. Cade
Publisher:
ISBN:
Category : Buteo
Languages : en
Pages : 300
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Author:
Publisher:
ISBN:
Category : Wildlife conservation
Languages : en
Pages : 1016
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Author: Tracy L. Flemming
Publisher:
ISBN:
Category : Birds of prey
Languages : en
Pages : 266
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Book Description
This report serves as a source manual of raptors occurring on Army Corps of Engineers lands in the Pacific Northwest. It consists primarily of a comprehensive literature review covering aspects of the biology of 35 species of eagles, hawks, falcons, vultures, and owls. The manual was developed to provide biologists and resource managers with background information to facilitate the application of sound raptor management practices on project lands. While the literature is cosmopolitan, references are applicable to species found in, but not limited to, the Pacific Northwest. Approximately 4,000 citations, compiled through 1983, are included. General guidelines on raptor management and survey techniques are provided. An outline of techniques is given for habitat assessment, development, and management applicable to Federal lands, and recommendations are provided for management needs regarding various land use practices and recreational activities. Basic procedures for conducting raptor nesting surveys, migration counts, and winter surveys are outlined. Raptor studies conducted on project lands in the US Army Engineer Division, North Pacific, are summarized.
