What is the only animal believed to hunt humans actively?

Polar bears are the only animal known to actively hunt human beings. Polar bears are well known for having no fear of human beings and for stalking, killing and eating them.

Polar bears are highly intelligent animals and have been found to be just as smart as apes. This intelligence is necessary for hunting seals, which are their main food source and are very difficult to catch. Polar bears are opportunistic hunters and are always alert to possible food sources, which is why they do not hesitate to hunt a human in their path. Native hunters consider the polar bear to be a very prized hunt because of its intelligence and ferocity.