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Beavers (Castor canadensis) are North America’s largest rodent. They have several adaptations for an aquatic life. These include nostrils and ear canals that can be sealed off, webbed fore- and hindfeet for swimming, a transparent nictitating membrane that covers each eye, and an upper lip that seals their mouth shut behind the large upper incisors. Outside of the winter period when they consume bark, beavers mainly feed on aquatic vegetation such as cattails and duckweed. They have a lot of han