Legal restrictions on methods of hunting are lax, as most state departments of wildlife openly acknowledge feral pigs as an ecological threat and some classify them as vermin. For example, the Wisconsin Department of Natural Resources considers them unprotected wild animals with no closed season or harvest limit, and promotes their aggressive removal. Their status as a non-native species that can do incredible amounts of damage to multiple types of terrain—Florida swampland, California chaparral, Eastern woodland, even Texas grassland—is also what makes state departments of wildlife have a laissez-faire attitude on what weapons can be used, which can be anything from a rifle to a dagger.