The young polar bears often play with the food that their mothers caught, throwing it through the air and nibbling it without tearing off the pieces. On many occasions polar bears have been seen performing funny behaviors, such as scrubbing in the snow and sinking their heads, rolling on their backs, hitting the ground with their legs or playing with branches. Polar bears do not hibernate, but enter a state of lethargy. Pregnant females also go through this state in which their heart rate and temperature decreases, but they do not have deep sleep as in the case of hibernation and any movement or strange presence can wake them up quickly. Unlike other species of Ursids, polar bears do not hibernate, but enter a state of lethargy in which the functions of their bodies are still active. Their aggressiveness increases in the reproductive seasons, in which the males face each other to have the right to mate or fight over food. Some stay together for a few periods of time until they finally decide to go their own way. They are solitary, except for mothers with their offspring, breeding pairs and groups formed by a great abundance of food, such as when there is a whale carcass that is able to support the feeding of a large number of them. Their aggressiveness increases during the reproductive seasons or when another polar bear tries to steal their food. Spy cameras have been destroyed due to the curiosity they arouse in these animals – investigating the cameras and touching them with their enormous claws can result in crushing them. They even manage to walk in that position for short distances. On many occasions, we can observe that they will stand on two legs and raise their heads to look at what is around them while sniffing the air. They are extremely curious! As polar bears commonly don’t leave their lair for the first time until they reach the early stages of adulthood, they are very interested in the world around them.
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