The common features of insects are a segmented body which means their bodies are divided into three parts: head, thorax and abdomen, jointed legs which can be six or more. Insects also have an exoskeleton which is the hard covering over their bodies. Insects are both harmful and useful. Harmful insects include beetles, mosquitoes, houseflies, termites, etc. Useful insects include honeybee, silkworm, fruitfly, etc. According to entomologists, there are around 5-10 million species of insects across the world.
What are Insects?
