The main story of our article is mainly about the adaptation of pests. When such annoying pests that cause great harm to agriculture are adaptable, we perceive them as fierce. The background of this comic is a map, representing the extent of its distribution, which is extensive and the main sampling point of this article. Corn is the main hazard crop for this pest. Many fierce insects continue to harm corn, resulting in huge losses of corn crops. This article highlights the adaptability of pests and has attracted the attention of readers to the evolutionary study of pest adaptation.