Some moth species in North America can generate enough body heat to remain active in freezing temperatures, despite their small size and limited energy stores. Researchers suspect these moths obtain energy through a unique relationship with red squirrels that tap sugar maple sap. This surprising warmth in insects challenges assumptions that such traits only appear in more advanced creatures.
Image: Operophtera brumata (winter moth), Emanuele Santarelli, CC BY-SA 4.0, Wikimedia Commons.
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