(Mt. Rainier Nat'l Park, WA) -- Fishers are making a return to the Washington wilderness by being re-introduced to the Cascade Mountains. The "Seattle Times" reports ten fishers were released Friday into Mount Rainier National Park. The Washington Department of Fish and Wildlife says fishers were driven to extinction in the Evergreen state by the mid-1900s by hunters who sought the animals for their pelts. The department says the ten fishers were held in captivity for several weeks before being vaccinated and treated for health issues, then underwent inspections before being released into the wild.