Photos have been taken from the U.S. Fish and Wildlife Service Digital Library System, in the public domain; from “Laura Erickson’s For the Birds” Web Site, from Greg Lasley, by permission; from Tom Grey, by permission; and from the collections of Mike Hamilton, Dale Garvey, David Caley and other Trilogy birders.
The photos of the Townsend’s Warbler, the Willow Flycatcher, the Warbling Vireo and the Black-headed Grosbeak were by Greg Gillson, The Bird Guide, Inc., http://thebirdguide.com (by permission).
The photo of the Vaux’s Swift was taken by Glen Tepke and the photo of the Black Swift was taken by Michael G. Shepard. Both were used by permission.