The average length of time that a butterfly lives is about three months. When butterflies are adults, they live around one months time. The three most salient features of the head are the antennae, the eyes and the proboscis. The antennae are used for balance in flight and olefactory sensation. The antennae are also useful for smell.
Female butterflies release pheromones into the air.
The male butterflies of many species can detect the pheromones from as far away as 2 kilometers. All of these things depend on whether or not the male can find the female to mate with her. Some species of moths are sensitive to the presence of the females' pheromones up to 5 kilometers distance. The eyes of butterflies are large spherical structures. The eyes consist of thousands of hexagonal shaped omatidea.