Butterflies taste with their feet

Butterflies taste with their feet.
The taste receptors of a butterfly are placed on its feet.?A butterfly’s sense of taste is coordinated by chemoreceptors on the tarsi, or feet, which work only on contact, and are used to determine whether an egg-laying insect’s offspring will be able to feed on a leaf before eggs are laid on it.
A female butterfly lands on different plants, drumming the leaves with her feet to make the plant release its juices. Spines on the back of her legs have chemoreceptors that detect the right match of plant chemicals. When she identified the right plant, she lays her eggs. A butterfly will also step on its food, using organs that sense dissolved sugars to taste food sources like fermenting fruit.

Source: Wikipedia, About.com

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