In message <01HXDN4TTRK89BXQNK at delphi.com> Andy S. writes:
> ;{+gWilson's Warblers are common summer residents in the "Interior Wet belt"
> (Canadian term for this zone which extends north along the west slopes of the
>
> Monashees, Columbia Mtns, Selkirks and Canadian Rockies to about latitude
> 54N)
> and of Washington's northeastern counties. The commonest breeding warbler of
> lowland thickets in this zone is the MacGillivray's Warbler, the commonest in
>
> subalpine (especially avalanche slide areas)thickets are Wilson's.
>
> A cautionary note: as Wilson's are late spring migrants, I suspect a number
> of
> "Possible" records in the Atlas cards represent birds on the move. Like the
> Golden-crowned Sparrow, many Wilson's Warbler breed in very snowy habitats,
> which are tardy in melting, thus delaying breeding of birds in these areas.
>
> Andy Stepniewski
> Wapato WA

Yes, at the Douglas Creek Banding Station Wilson's Warblers are the
latest "spring" migrants - this year I banded 6 on June 4 (4 males,
2 females).

They return in early/mid August with the Nashvilles and Townsends.
Does this imply very productive nesting sites i.e. deciduous habitats?

In northern Washington and Idaho the few singing male Wilson's Warblers
I've observed in the last 15 years were always associated with deciduous
habitats.


Dan Stephens (509) 662-7443
Dept. of Biology fax: (509) 664-2538
Wenatchee Valley College e-mail: dstephen at ctc.edu
1300 Fifth Street
Wenatchee, WA 98801