Scientists list all of these under the larger category of arthropod ​ — the largest division in the animal kingdom — ​ which includes at least a million known species.
अर्थात, काही कीटक वेदनाकारी दंशाने किंवा मोठ्या संख्येने येऊन मानवाला व प्राण्यांना उपद्रव करतात.