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    Endogenous timing factors in bird migration (1972)
    In:  CASI
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    Publication Date: 2019-06-27
    Description: Several species of warbler birds were observed in an effort to determine what initiates and terminates migration. Environmental and endogenous timing mechanisms were analyzed. The results indicate that endogenous stimuli are dominant factors for bird migration especially for long distances. It was concluded that environmental factors act as an assist mechanism.
    Keywords: BIOSCIENCES
    Type: NASA, Washington Animal Orientation and Navigation; p 321-338
    Format: application/pdf
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