Environmental groups sue BLM over cattle calls on San Pedro River
Arizona environmentalists have followed through on their threat to sue the federal government over stray cows in the San Pedro Riparian National Conservation Area. The Tucson-based Center for Biological Diversity and the Phoenix-based Maricopa Audubon Society accuse the Bureau of Land Management of violating the Endangered Species Act by failing to keep trespassing cattle away from a rare plant called the Huachuca water umbel.