Cover Use and Predator-Related Mortality in Song and Savannah Sparrows

Cover Use and Predator-Related Mortality in Song and Savannah Sparrows

I studied Savannah (Passerculus sandwichensis ) and Song (Melospiza melodia ) sparrows, to address the common assumption that cover influences the risk of predator-related mortality in some species. Data that indicate interspecific differences in both habitat use and mortality risk are also presente...

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Veröffentlicht in:The Auk 1990-10, Vol.107 (4), p.775-778
1. Verfasser: Watts, Bryan D.
Format: Artikel
Sprache:eng
Schlagworte:
Bird songs
Birds of prey
Censuses
Foraging
Hunting
Melospiza melodia
Mortality
Passerculus sandwichensis
Predation
Short Communications
Sparrows
Vegetation
Wildlife habitats
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Beschreibung
Zusammenfassung:I studied Savannah (Passerculus sandwichensis ) and Song (Melospiza melodia ) sparrows, to address the common assumption that cover influences the risk of predator-related mortality in some species. Data that indicate interspecific differences in both habitat use and mortality risk are also presented. The fieldwork was done on three sites located 15 km east of Athens, Georgia. All sites were agricultural fields, fallow for 2-3 yr, and containing dense, homogeneous stands of horseweed (Erigeron canadensis ).
ISSN:0004-8038
1938-4254
DOI:10.2307/4088011