Sierra Club won its Canada lynx lawsuit after a federal judge found that critical habitat areas in the West had been arbitrarily omitted from protection by the U.S. Fish and Wildlife Service (FWS). In 2009, the FWS issued a critical habitat designation for the lynx but left out thousands of acres of critical habitat in the Southern Rockies, Idaho, and Montana. The new ruling by Judge Donald Malloy states that FWS must propose a revised habitat designation. If the revised designation includes the expanded area, it would give the unique, high-altitude residing cat more habitat and a better chance of survival in the face of global warming.
Read more here at Sierra Club's Lay of the Land webpage.