Defenders of Wildlife issued a press release on the decision by eleven different conservation groups to challenge the U.S. Fish and Wildlife Service's removal of the northern Rocky Mountain wolf from the endangered species list. The groups assert that the removal violates the Endangered Species Act because of the genetic inadequacy of the present population and the refusal of Wyoming, Idaho, and Montana to commit to conservation. The groups submitted a notice letter before the new delisting rules were set to be issued and indicated that they will seek relief in federal court. A copy of the notice, sent on behalf of the groups by Earthjustice, is available here (pdf).
The groups involved included Earthjustice, Defenders of Wildlife, Natural Resources Defense Council, Sierra Club. Center for Biological Diversity, The Humane Society of the United States, Jackson Hole Conservation Alliance, Friends of Clearwater, Alliance for the Wild Rockies, Oregon Wild, Cascadia Wildlands Project, and Western Watersheds Project.