Curious Facts / Nature
Can butterflies taste with their feet?
A brief landing on a leaf can reveal a hidden sensory task.
Check a surface before taking a meal
When a foot touches a leaf, it can pick up chemical signals from the surface. Tasting does not have to begin after food enters the mouth. But tasting with the feet does not mean swallowing food through them.
Choosing food for the next generation
Female butterflies also use this sense when choosing plants for their eggs. They are checking for plants that their caterpillars can eat.
A leaf beneath a butterfly is therefore not necessarily the adult’s immediate meal. Contact with a plant can also provide information about a suitable home and food source for its offspring.
How can information from a leaf be used?
A simplified use of sensory information, not a depiction of swallowing food through the feet.
- Contact
A foot touches the plant surface.
- Detect
Taste receptors respond to chemical signals.
- Use
The information can help select a plant for eggs.
Visual evidence: Washington State University — How do butterflies taste with their feet? · Smithsonian National Zoo — 8 Reasons to Bee In Awe of Pollinators
What did you discover?
2 questions · Read the explanation and evidence, then continue to the next question.
Sources and scope
- Washington State University — How do butterflies taste with their feet?
Entomologist explanation: foot taste receptors, contact with plants, and host-plant selection
- Smithsonian National Zoo — 8 Reasons to Bee In Awe of Pollinators
Opening butterfly caption: tasting with the feet
Scope of this fact
- This concerns sensory functions in butterfly feet, not swallowing food through them or all insects.
- Host-plant selection varies between species. The diagram shows a use of sensory information, not every step of every decision.
Original writing and English translation by Rantap