North American beaver large, webbed hind feet. The unwebbed front paws are smaller, with claws. The eyes are covered by a nictitating membrane which allows the beaver to see under water. The nostrils and ears are sealed while submerged. A thick layer of fat under its skin insulates the beaver from its coldwater environment. The beaver's fur consists of long, coarse outer hairs and short, fine inner hairs (see Double coat). The fur has a range of colors, but usually is dark brown. Scent glands near the genitals secrete an oily substance known as castoreum, which the beaver uses to waterproof its fur.
Animal welfare and rights in South Korea by the Ordinance of the Ministry for Food, Agriculture, Forestry, and Fisheries, such as stunning or gas. The government is to formulate and implement a comprehensive animal welfare plan every five years, including matters related to animal farming. Regarding animal testing, alternatives to animals must be considered, animals less sensitive to pain should be used where possible, anesthetics are required, and lost or abandoned animals which have served humans (e.g. guide dogs) must not be used. The law stipulates that Animal Experimentation Ethics Committees be created in facilities where animals are experimented on. In addition to the Animal Protection Act,