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Butterflies taste where they put their feet

Receptors on their feet help butterflies recognise what they land on, including when choosing a plant for their eggs.

1 min readPublished
A stylised yellow and dark butterfly with small tails on its wings touches a leaf with six legs; its antennae and coiled proboscis are visible.
Positive Times · ImageGen · AI-assisted illustration

For a butterfly, landing on a leaf can also be a taste test. The Florida Museum explains that many taste receptors are on the feet, although they occur elsewhere too: contact helps a butterfly assess a plant before laying eggs on it. [1]

Entomologist Rich Zack of Washington State University describes the feet as tools for an initial chemical assessment. The choice also matters for future caterpillars, many of which eat only particular host plants. The leaf is therefore examined before the caterpillar starts eating. [2]

Take this with youOur comment: for them, landing can mean reading the menu. The rest of us can keep using our eyes.

Read the sources (2)
  1. Butterfly Rainforest Moment, How do they taste? Florida Museum of Natural History · accessed 12 Sept 2026
  2. How do butterflies taste with their feet? Washington State University · Ask Dr. Universe · accessed 12 Sept 2026

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