北极熊
Polar bears’ paws are made for roaming and thriving in the Arctic.
Polar bear paws also play a role in reproduction. Males may travel long distances in search of a mate, pausing only to carefully sniff the tracks of any bears they cross in their travels. Adult females appear to have glands in their paws that leave a chemical scent capable of informing an adult male that she is potentially available for breeding. When a male detects such a track, he immediately starts following the female until he catches up.
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