Brown bears are some of the largest carnivores on Earth. They hunt alone except during seasonal spectacles such as salmon spawning which causes large numbers of bears to gather together. As well as fish, these fearsome predators can bring down moose, elk and even black bears. Brown bears spend nearly half their lives underground in a state of hibernation. Females even give birth and nurse a litter underground during the winter months, although they will lose a staggering 40% of their body weight in the process.
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