Spotted it at about 5pm Sunday eve, and stayed near it for about 30
mins. It was very vocal the whole time, but not so visible, moving
between the lower willows and higher cottonwoods.

Tried to mark the exact spot on this map:

http://maps.google.com/maps/ms?hl=en&ie=UTF8&msa=0&msid=111003405907274459640.00048a0f68c27bfcd0eb8&ll=47.685672,-121.9485&spn=0.025597,0.07493&t=h&z=14

Ron Benshalom
Seattle