Butterflies' taste sensors are located in their feet. So they are able to taste food by just standing on it. In fact, these creatures do not have mouths at all, so they can't bite or chew. Instead, they have a long straw-like structure known as a proboscis. They use it in order to drink nectar and juices. However, a proboscis doesn't have any taste sensors as they are located on the very bottom of a butterfly's feet.


More Info: biointerestingfacts.blogspot.com