AVIS-IBIS

Birds of Indian Subcontinent

Breeding Density of Snowy Owls Nyctea scandiaca in Relation to Food, Nest Sites and Weather

Publication Type:Journal Article
Year of Publication:1986
Authors:Wiklund, CG, Stigh, J
Journal:Ornis Scandinavica
Volume:17
Issue:3
Date Published:1986
ISBN Number:00305693
Keywords:Bubo, Bubo scandiacus, Nyctea, Nyctea scandiaca, Strigidae
Abstract:Rodents and Snowy Owls varied synchronously in numbers during a 5-yr period that included two peaks in rodent density. The owls bred in three areas with many hillocks and boulders. More nests were on hillocks than boulders, and high places were used as perches. During the second rodent peak year, when snow reduced access to food and suitable nest sites, owl breeding density was lower and territories were larger. Fledgling production was not, however, significantly lower, perhaps indicating that the larger territory sizes to some extent may have compensated for a lower availability of rodents.
URL:http://www.jstor.org/stable/3676837
Short Title:Ornis Scandinavica
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