There are now an estimated (counted to be about) 10-15 million beavers in North America!
Mammals - Facts for Kids

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Random Facts About Mammals For Kids
Captive sloths often live longer than wild sloths because they don’t face predators and receive regular veterinary care!
Orangutans make mental maps of when and where fruit trees will be ready to eat in their area!
One of the fastest recorded speeds for a racehorse is nearly 44 miles per hour (71 km/h) — almost as fast as a car on a city street!