Cassin's Vireo on nest, Idlewild Campground, Harney Co., Oregon on 26 May 2009 by Greg Gillson.Vireos often sing from their nests. I followed this singing Cassin's Vireo (above) right to its nest. Other Pacific NW bird bloggers have also written recently about nesting birds...
Bill Schiess combines his birding with fishing. He has a photo collection of Eastern Kingbirds at a nest at Henrys Lake, Idaho.
Also in Idaho, as posted on the Avimor Birding Blog there is a post showing the nests of Swainson's Hawk, California Quail, and Cedar Waxwing.
Another Cedar Waxwing nest was found at the Sandy River delta near Portland, as reported on the Laura Goes Birding blog.
Andy Frank posts photos of a Violet-green Swallow at a nest box.
Over at The Flycatcher is a photo of a White-headed Woodpecker outside its nest on a ponderosa pine.
At BirdFellow, Dave Irons offers up a photo essay of Western Kingbirds feeding their young on a typical nest on a power pole.