Here's why:
* Beavers are herbivores: They primarily eat bark, leaves, and aquatic plants. They don't hunt or attack humans.
* Defensive behavior: If threatened, beavers may slap their tails on the water to warn others, or bite defensively. Their bite can be powerful, but they lack the size and aggression to pose a serious threat to a human.
* Avoidance: Beavers are generally shy and avoid human contact whenever possible.
However, beavers can cause harm indirectly:
* Damming: Their dams can flood areas, potentially causing property damage or making access difficult.
* Tree felling: They can fell trees, which could potentially injure someone if they are in the wrong place at the wrong time.
Overall, while beavers are powerful animals, there is no evidence that they have ever killed a human. They are more likely to be concerned with avoiding humans than harming them.