;{+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