In January–February, the female bear gives birth to blind and tiny cubs that weight up to 500 grams and look like small mittens. The mother warms them in her paws and breathes on them. In spring, when time comes to leave the lair, the cubs can see and walk. Bears that live in the Far East hand down their fishing skills from generation to generation. Mothers train their cubs where to fish and how to fish various fish species — the best place to ambush the humpback salmon is a riffle, and the chum salmon should be hunted at spawning sites and in springs.
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