Coleoptera insects are beetles. It is the largest order of insects and the largest order of animals, with about 300000 species. In addition to the ocean, they are found in mountains, plains, rivers, swamps and soil all over the world. Ornamental beetles can be roughly divided into two types: paphiopedilus and spade beetles. It should be noted that beetles are not equal to Unicorn beetles, and unicorn beetles belong to paphiopedilus.
Beetles are the oldest type of insects. They flourished in the upper Jurassic or lower Baikui. At that time, higher plants did not appear, nor did Hymenoptera and Lepidoptera insects. Beetles were the earliest pollinators in geological history. It is suitable to pollinate some plants with larger and flat flowers (butterfly or bowl shaped flowers) than the primitive type. They have strong odor and attract beetles.