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The beaver is the national animal of Canada. They are mammals. They live in ponds, lakes, and streams. Beavers are strong swimmers and graceful divers. They have lungs and a furry body. A beaver's baby is called a kit. The babies drink their mother's milk. The beaver is warm-blooded. Its body temperature stays warm, even in icy water. The beaver is the largest rodent in North America. Its front teeth never stop growing. Beavers live …

…minutes at a time. Water trapped behind a dam forms into a deep pond. The beavers are safer in the deep water. Here they can build a home, store food, and escape from enemies. Beavers can live up to 12 years in the wild. They are skilful builders. Millions of years ago, beavers lived in many northern parts of the world; some were as big as bears. Beaver families cut down hundreds of trees a year.