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Date: Tue, 18 Aug 1998 10:44:26 -0700 (PDT)
From: "R. Donnelly" <roarked at u.washington.edu>

Yesterday, I observed a large mixed species flock foraging in a
group of alders in Olallie State Park near I-90. The bulk of the birds
were small...warblers and chickadees, but two larger birds caught my eye.
Closer inspection revealed that these birds were hatch year Brown-headed
Cowbirds (nestmates). The real surprise, however, was that they were
provisioned by Black-throated Gray Warblers! Does anybody know how
frequently this warbler serves as a host for cowbirds in this area?


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Roarke Donnelly

College of Forest Resources 206.543.8264 work
Div. of Ecosystem Science and Conservation 206.685.0790 FAX
University of Washington 206.283.6795 home
Box 352100
Seattle, WA 98195-2100
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