USDA dogs sniff out snakes
Tony Thompson, U.S. Department of Agriculture brown tree snake detector dog handler, and Striker, Striker, a USDA brown tree snake detector dog, inspect an aircraft prior to departure April 30, 2015, at Andersen Air Force Base, Guam. With the utilization of the 17 active detector dog teams and 4,000 traps, the USDA has helped significantly prevent the spread of the brown tree snakes. (U.S. Air Force photo by Senior Airman Katrina M. Brisbin/Released)

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Photo by: Senior Airman Katrina M. BrisbinReleased |  VIRIN: 150430-F-EP111-243.JPG