Bert the Beaver (14/26)
This is also part of this series: All About Animals (26)
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Subjects:
Animal Behaviour, Animals, Evolution, Natural History, Nature |
Grade Level: K-Gr3
Producer: BBC
Closed Captioned: No |
Running Time: 25 mins
Country of Origin: Great Britain
Study Guide: No |
Copyright Date: 2004
Available in French: No
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Bert the Beaver is two years old. Like other rodents, beavers have huge incisors that wear down at the back faster than at the front, like self-sharpening chisels. Beavers live for about 10 years, they mate for life and they will do everything together. Bert and his mate have their own bit of river in the Teton Mountains of Wyoming, USA. There, after 20 days of hard work, they have built their own home or ‘lodge' - a log cabin with hidden underwater entrancesso they can dart in and out under the safety of the water. Beavers are aquatic; they swim well and can stay underwater for 15 minutes. They have special lenses in their eyes which act like goggles, so they swim open-eyed which is useful as it's a bit of an assault course down there.Beavers have a huge effect on their environment: clearing trees, blocking rivers and building dams and lodges. Each day a busy beaver can shift 25 times its own body weight. Bert has taken a good few months to build this dam and it is over 50m long. (The longest beaver dam ever measured measured one and a half kms – 30 times the length of Bert's!) Beavers' favourite food is just under the bark of trees, a kind of plant tissue called cambium. Beavers can't get enough of it. They also love to eat plants, leaves, and twigs. |
Links: http://http://www.bbc.co.uk/nature/animals/