In this 2013 photo provided by Rolf Peterson one of the few remaining gray wolves on Isle Royale, Isabelle, takes refuge on an icy bluff over Lake Superior to lick her wounds after being attacked by other wolves. Federal officials say Isabelle was found dead on the Minnesota mainland having been shot with a pellet gun. Park officials said Friday, March 14, 2014, the 5-year-old female was shot in the chest with a lightweight pellet. (AP Photo/Courtesy Rolf Peterson, File)
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