🤯 Verified Fact · Nature
Wacky WorldAnimals & Nature
Adult butterflies possess specialized chemoreceptors located on the tarsi (the lowest segments of their legs and feet). When a female butterfly lands on foliage, microscopic sensory spines on her feet drum and pierce the plant surface to taste dissolved chemical compounds and sap. This allows her to confirm within fractions of a second whether the host plant is the correct, non-toxic species before laying her eggs, ensuring surviving foliage for emerging caterpillars.
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