Adult Nomadism in Tengmalm's Owl Aegolius funereus

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Abstract
To test the hypotheses that tengmalm''s owl is nomadic, Swedish ring recoveries of adults and juveniles marked during the breeding season were studied. There was no clear difference in dispersal distance between adults and juveniles. In 2 cases, adults nested a few 100 m from the sites where they bred during 1 and 2 preceding years, respectively. There was 1 clear case of adult nomadism: an owl captured on the nest breed 2 yr later 510 km away. This may be the longest distance recorded between 2 breeding sites in the same bird.