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    Author(s): David L. Evans
    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. 173-174.
    Publication Series: General Technical Report (GTR)
    Station: North Central Research Station
    PDF: View PDF  (58.5 KB)

    Description

    Nocturnal netting operations have been conducted at the Hawk Ridge Nature Reserve since 1972. From 1988 to 1992 a recording of human whistles simulating the calls of fall migrant Northern Saw-whet Owls (Aegolius acadicus) was broadcast on a random, on or off, half-night basis. Mist net captures of Saw-whet Owls increased about fourfold during the broadcast sessions, while captures of Long-eared Owls (Asio otus) decreased as much as 24 percent.

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    Citation

    Evans, David L. 1997. The influence of broadcast tape-recorded calls on captures of fall migrant Northern Saw-whet Owls (Aegolius acadicus) and Long-eared Owls (Asio otus). 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. 173-174.

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