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    Long-term population trends in songbirds: Evidence from a general netting program

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    Date
    1988-04-01
    Author
    Weise, Charles M
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    Abstract
    A one-day-a-week general bird-netting operation has been conducted each autumn since 1965 at the UWM Field Station. Overall results for 23 years are presented, on a species by species basis. The 101 species captured were divided into three groups for a linear regression test for long-term population trends. Permanent residents showed no change over the 23 years. Short distance migrants exhibited a slight but not statistically significant decline. Long-distance migrants, on the other hand, exhibited a statistically significant decline, lending support to other studies which have reported population declines in North American songbirds that spend the winter in the tropics.
    Subject
    songbirds
    population trends
    migratory birds
    Permanent Link
    http://digital.library.wisc.edu/1793/90301
    Type
    article
    Citation
    Weise, C.M. 1988. Long-term population trends in songbirds: Evidence from a general netting program. Field Station Bulletin 21(1): 1-9.
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    • UWM Field Station Bulletins

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