Canada

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You can see for yourself why beavers have a reputation as hard workers in this video showing them build a dam. Within their dams they store wood and food and use them to protect themselves from predators such as bears.

In 2007, one Canadian ecologist discovered the world’s largest beaver dam in Northern Alberta – it's so large that it can be seen from space! It is quite unusual for beaver dams to be larger than 500 metres.

Construction of the dam is said to have started in the 1970’s with generations of beavers contributing to this mammoth effort. The dam is made from a combination of beavers transporting wood and building the walls, but also of naturally felled trees – all of which are cemented solidly together by mud collected and then plugged by the hard working beavers.