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
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The nose and ears have valves that may be closed while swimming. There is a special membrane to protect the eyes while it swims.
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Habitat: Mississippi River; Missouri River; interior rivers and streams; natural lakes and prairie marshes; constructed lakes, ponds, and reservoirs
