U.S. Department of the Interior(@Interior):Move over, meteorologists. Woolly bear caterpillars have a winter forecast! Folklore says more black means a harsh winter, while a wider brown band predicts milder weather. Scientists say the bands reflect age and growth, not future weather. But some folks still trust the fuzz!

U.S. Department of the Interior

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U.S. Department of the Interior@Interior

2026.11.09 22:00

Move over, meteorologists. Woolly bear caterpillars have a winter forecast! Folklore says more black means a harsh winter, while a wider brown band predicts milder weather. Scientists say the bands reflect age and growth, not future weather. But some folks still trust the fuzz!