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6 animals that change color in the winter


Migration, hibernation and food storage are all responses to seasonal changes. As the days become shorter and the nights get longer, hormone changes trigger an animal’s instinct to prepare for winter. 

As the snow begins to fall, some animals swap out their summer brown fur for white winter coats. From weasels to caribou, here are six animals that change their appearance with the seasons. 

Weasels

Only three weasel species change color: the least weasel (Mustela nivalis), the long-tailed weasel (Mustela frenata) and the short-tailed weasel (Mustela erminea) captured here. (Image credit: Kathleen Reeder Wildlife Photography via Getty Images)

Weasels are active woodland predators that squeeze into the underground burrows of voles and mice, which constitute up to 80% of their diet. Although weasels are found all over the world, only those in the Northern Hemisphere change color. 

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