Willamette Valley, William L. Finley National Wildlife Refuge, Oregon
May 24, 6:33 a.m.
Sunrise at 5:36 a.m.
Near a beaver pond at the Finley refuge, a black-headed grosbeak sings from the treetop as two warbling vireos call and sing while battling over apparent ownership of the grosbeak's tree.
Two warbling vireos calling and singing as they squabble over something; orange-crowned warbler, black-throated gray warbler, common yellowthroat, Swainson's thrush
Photo by Robert Royse