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    Author(s): Kort M. Clayton; Josef K. Schmutz
    Date: 1997
    Source: In: Duncan, James R.; Johnson, David H.; Nicholls, Thomas H., eds. Biology and conservation of owls of the Northern Hemisphere: 2nd International symposium. Gen. Tech. Rep. NC-190. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 107-110.
    Publication Series: General Technical Report (GTR)
    Station: North Central Research Station
    PDF: View PDF  (72.22 KB)

    Description

    We studied survival of the endangered Burrowing Owl (Speotyto cunicularia) using radio-telemetry in both Alberta and Saskatchewan. Adult females exhibited the highest mean survival (0.83) whereas adult male (0.46) and juvenile (0.48) rates were similar. Most mortality occurred during the post-fledging period when there was a peak of activity around the nest. The greatest mortality from vehicle collisions occurred in a fragmented agricultural landscape where predation was also the lowest. Our survival estimates, along with other considerations, suggest that low annual survival is potentially limiting Burrowing Owl populations on the Canadian prairies.

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    Citation

    Clayton, Kort M.; Schmutz, Josef K. 1997. Burrowing (Speotyto cunicularia) Owl survival in prairie Canada. In: Duncan, James R.; Johnson, David H.; Nicholls, Thomas H., eds. Biology and conservation of owls of the Northern Hemisphere: 2nd International symposium. Gen. Tech. Rep. NC-190. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station. 107-110.

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