Fish and Wildlife Service (FWS):
FWS, in the Department of the Interior, is the federal agency charged with managing and protecting the nationís wild plants and animals, including endangered and threatened species. It generally works closely with state agencies, which have management primacy for most species. (The federal government has assumed responsibility for marine mammals, migratory birds, and endangered and threatened species). It manages the National Wildlife Refuge System, and cooperates with private landowners in habitat conservation.