AVIS-IBIS

Birds of Indian Subcontinent

Field Evidence for Nomadism in Tengmalm's Owl Aegolius funereus

Publication Type:Journal Article
Year of Publication:1987
Authors:Korpimaki, E, Lagerstrom, M, Saurola, P
Journal:Ornis Scandinavica
Volume:18
Issue:1
Date Published:1987
ISBN Number:00305693
Keywords:Aegolius, Aegolius funereus, Europe, Strigidae
Abstract:Nomadism in Tengmalm's owl was studied on the basis of Finnish ring recoveries. Natal dispersal was more extensive than breeding dispersal and more extensive among females than among males. The latter trend was found also in breeding dispersal: females, which are larger and adapted to preying on cyclically fluctuating voles, change their breeding areas more readily than males, which are smaller and can hunt alternative prey. Finnish owls seem to be more nomadic than those breeding in Central Europe. This is in agreement with the prediction that nomadism is favoured by long intervals between years suitable for reproduction.
URL:http://www.jstor.org/stable/27669752
Short Title:Ornis Scandinavica
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