What feature of the weasel's winter white coat often remains dark?
Answer
The tip of the tail.
Weasels inhabiting northern latitudes or high elevations undergo a significant seasonal molt when winter approaches, resulting in a coat of pure white fur to provide effective camouflage against snow. Despite this drastic change in body coloration, a distinctive marker often persists: the tip of the tail remains dark, typically black. This dark tip can serve as a visible marker against a purely white snowy background, even though the main body fur has achieved full winter camouflage.

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