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    The Biology and Current Status of the Long-eared Owl in Coastal Southern California

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    Subject
    Long-eared Owl; Coastal Southern California
    Author
    Bloom, Peter H.
    Journal Title
    Scas: Bulletin of the Southern California Academy of Sciences
    Volume
    93
    Issue
    scas/vol93/iss1; 1
    Metadata
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    URI
    https://scholar.oxy.edu/handle/20.500.12711/10601
    Abstract
    The Long-eared Owl (Asio otus) is poorly known in southern California. <br /><br />This paper reviews its historic nesting distribution in Orange and western San <br /><br />Diego counties as determined from 79 egg set records from 5 museum collections, <br /><br />and contrasts this with the distribution of 50 nesting attempts as recorded in <br /><br />Orange and northern San Diego counties between 1968-1992. Comparisons reveal <br /><br />a substantial area of extirpation in the coastal region with a small, remnant <br /><br />population in interior areas. The number of historic breeding territories has de- <br /><br />creased by at least 55%. Reproduction appears good with 85% of 40 nests fledging <br /><br />young. Diet was typical of other regions with small rodents (Microtus calif ornicus, <br /><br />Reithrodontomys megalotis, and Thomomys bottae) comprising 90% of the prey <br /><br />by number.
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