(AP) — A mule deer conservation group is working with state officials on a five-year, $1.3-million study on a declining mule deer herd in southwestern Wyoming. Information will be collected from radio collars, satellites and implants in female deer that track birth rates. Muley Fanatic Foundation President Joshua Coursey says the decline in the size of the herd could have several causes, including predators, fences, changing habitat and competition with elk and wild horses.