In this March 14, 2006 file photo, a herd of wild horses graze near the Carson River. Wild horse advocates say they have no recourse but the courts after federal land managers rejected their request for an immediate moratorium on mustang roundups. The Bureau of Land Management plans to remove more than 30,000 horses from Western rangelands over the next three years to deal with soaring numbers of the animals and costs to manage them in a plan unveiled by Interior Secretary Ken Salazar in October 2009.