This morning I had a fall-plumaged BLACKPOLL WARBLER in the University of
Idaho Arboretum in Moscow. From the upper kiosk, follow the trail due
south 100+ meters to a trio of (labeled) Prospector Elm trees on the west
side of the trail. The Blackpoll spent most of its time skulking and
usually motionless inside of the lilac bushes just southwest of the 3
elms. The bird’s “favorite” lilac is inconspicuously labeled “Maiden’s
Blue Lilac”. It was extraordinarily difficult to see. I once stayed on it
for up to 10-15 seconds, foraging in the very bottom on that lilac bush.
Otherwise, I had a few other 1-2 second glimpses over the course of 90+
minutes. Eventually, it flew up in to the upper canopy of the one the
Prospector Elms (it would call when it would occasionally move), and again
disappeared into the leaves.

Unfortunately I could never get on it long enough to obtain photos, but
more details are in the eBird checklist:
http://ebird.org/ebird/view/checklist/S38998735

A PACIFIC WREN was in the same lilac, at one point, and was my first for
the Arboretum or anywhere in Moscow-proper. Otherwise, good numbers of
migrants including Wilson’s (10+), MacGillivray’s (5+), and Orange-crowned
Warbler, Hammond’s Flycatcher, Gray Catbird, White-crowned Sparrow, Etc.

Good Birding,

Carl Lundblad
Moscow, ID