(Jeannie Stafford | U.S. Fish and Wildlife Service | The Associated Press) This March 1, 2010, file photo released by the U.S. Fish and Wildlife Service shows a bistate distinct population of the greater sage grouse male strutting to attract a mate at a lek, or mating ground, near Bridgeport, Calif. Off-road vehicle enthusiasts are suing the Forest Service over plans to protect the bistate sage grouse they say were adopted illegally and will increase fire danger to the land-dwelling bird proposed for threatened status along the Nevada-California line.