Plural of gallfly; small insects that lay eggs on plants, causing the plant to form abnormal growths called galls.
Plural of 'gallfly' from Old English and Old French 'galle' meaning a lump or tumor-like growth on a plant, plus 'fly' for the insect.
Gallflies are nature's master manipulators—they inject chemicals into plants that literally reprogram the plant cells to build elaborate structures around the insect larvae, like biological high-rises!
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