For centuries, wild mustangs and burros have roamed the West in states like Nevada, Montana, and Wyoming. The U.S. Bureau of Land Management is charged with controlling their population.
Each year they use helicopters to corral a select number of wild horses that are then put up for adoption. But since the economic downturn, fewer people are adopting. Meanwhile more horses are being born each year.
Recently, a 14-member National Research Council released a report saying the BLM should stop rounding up the horses and depend more on contraception. Committee member and wildlife birth control expert Cheryl Asa joins the show to explain how this new plan could work.