FILE - In this file photo taken Tuesday, Jan. 13, 2015, a male red wolf enjoys a feeding in it's habitat at the Museum of Life and Science in Durham, N.C.  A lawsuit filed Thursday, Nov. 12, 2015,  argues that the U.S. Fish and Wildlife Service violated the Endangered Species Act when it gave landowners permission on two occasions to kill wolves without meeting strict legal requirements. It asks a judge to force the service to stop such incomplete kill approvals and to perform a past-due review of the wolves' endangered status. (AP Photo/Gerry Broome)
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