The beaver may grow to four feet long, including a nine- to 18-inch tail, and weigh up to 60 pounds. It has brown waterproof hair and thick underfur on its body
The nose and ears have valves that may be closed while swimming. There is a special membrane to protect the eyes while it swims.
Habitat: Mississippi River; Missouri River; interior rivers and streams; natural lakes and prairie marshes; constructed lakes, ponds, and reservoirs