A Yellow Warbler surveys its surroundings from the branch of a dead snag, June 9, 2018, Travis Air Force Base, Calif. Most warbler species only migrate through Travis on their way to breeding or feeding grounds, but some occasionally stay throughout the summer months if there is suitable habitat. (U.S. Air Force Photo by Heide Couch)

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Photo by: Heide Couch |  VIRIN: 180609-F-RU983-0022.JPG