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A brown tree snake on the branch of a tree in the U.S. Territory of Guam, an island in the Western Pacific Ocean, the largest of the Mariana Islands.  There are no birds on the Pacific Island of Guam thanks to the Brown Tree Snake. These hungry egg-eating snakes have overrun the tropical island after arriving on a lumber freighter from New Guinea during World War II. Besides wiping out the bird population, Brown Tree Snakes cause frequent power outages: they commit short circuit suicide when climbing between power lines.