From the Associated Press via the Vail Daily:
The federal lawsuit filed Tuesday in Washington, D.C., by the Center for Biological Diversity challenges a 2007 decision that kept the fish off the endangered species list. The U.S. Fish and Wildlife Service decision said there was evidence of an increased number of populations of the fish. But Noah Greenwald of the Portland-based Center for Biological Diversity says the trout is gone from 87 percent of its historic range, which included parts of Arizona and New Mexico.
More endangered species coverage here.