Nutrition:
Polar bears are tertiary consumers and feed almost exclusively on meat. Ringed seals make up the majority of their diet, though they also feed on bearded seals, harbor seals, harp seals, hooded seals, and other sea mammals such as walruses and beluga whales. When food is plentiful, they will often just feed on blubber and leave the carcasses behind for scavengers. Blubber is better for maintaining their layer of fat for both insulation and storing energy.
Having huge stomachs allows them to eat up to 150 pounds of food in a single sitting. Because of this, they can go up to a couple weeks without food if necessary. However, in order to maintain their body weight, polar bears must kill a seal (or equivalent) every 5 or 6 days. Being the most patient of all bears, a polar bear will sit for hours next to a hole in the ice waiting for a seal to surface. However, when pack ice melts in the summer, making it difficult to hunt seals, polar bears hunt on land and feed on just about anything edible such as birds, rodents, eggs, berries, etc
Having huge stomachs allows them to eat up to 150 pounds of food in a single sitting. Because of this, they can go up to a couple weeks without food if necessary. However, in order to maintain their body weight, polar bears must kill a seal (or equivalent) every 5 or 6 days. Being the most patient of all bears, a polar bear will sit for hours next to a hole in the ice waiting for a seal to surface. However, when pack ice melts in the summer, making it difficult to hunt seals, polar bears hunt on land and feed on just about anything edible such as birds, rodents, eggs, berries, etc