Butterflies, commonly known as "butterflies", have about 14000 species all over the world, most of which are distributed in America, especially in the Amazon River basin, and are distributed in other parts of the world except the cold regions of the North and South poles. In Asia, Taiwan Province Province is also famous for its wide variety of butterflies. Butterflies are usually brightly colored, with various spots on their wings and bodies, and a pair of rod-shaped or hammer-shaped antennae on their heads (this is the main difference from moths, which have diverse antennae). The largest butterfly can spread its wings up to 24 cm, and the smallest is only 1.6 cm. Big butterflies attract people's attention, and some people collect all kinds of butterfly specimens. In the United States, "butterfly watching" migration, like "bird watching", has become a new activity, attracting many people to participate. There are many kinds of butterflies that are the main pests of agriculture and fruit trees. According to the characteristics and evolution degree of butterflies, butterflies in the world can be divided into 2 families, 17 families, as follows: ★ Lepidoptera ☆ Lepidoptera ☆ Eupteridae ☆ Megapteridae ★ Papilioidea ☆.