When one thinks about taste one often relates it to the tongue or sensors in the mouth. However, weird as it may seem, a butterfly doesn't have a mouth to begin with. So how does it taste and eat its food? Well nature gave her something special: the ability to taste with its feet. So basically by just standing on a leaf, or any food, she could taste it. The taste sensors that are usually found in the tongue of a human, for example, are located on the bottom of the feet of the butterfly. And instead of having a mouth that allows it to bite or chew, a butterfly has what’s called a proboscis which is a long straw-like structure. It uses this structure to drink nectar and juices that it has already tasted with its feat.
Reference:
-Biology (2007, January 15), Butterflies taste with their feet. Message posted to http://biointerestingfacts.blogspot.com/2007/01/butterflies-taste-with-their-feet.html
-Image taken from http://www.yorkblog.com/teentakeover/img/ag-butterflies.jpg
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