Polar bears are the largest land predators in the world, and they are found in the Arctic Circle. They are classified as a vulnerable species due to their declining population, which is caused by climate change and hunting. Polar bears are mostly solitary animals but can sometimes be seen in large groups during their mating season. They feed mainly on seals and other marine mammals, but they also eat fish, birds, and eggs. Polar bears have thick fur to keep them warm in the cold environment of the Arctic, and they have large paws that help them move on ice and snow.