Thus the insect body is separated by constrictions or divided into three distinct sections. The segmented characteristics of insects gives them the advantage of movement and activity. Segmentation also provides efficiency. Each body segment is specialized into functions such as securing food, locomotion and reproduction. The head contains the antennae and mouthparts.
Eyes are either simple or compound.
Antennae are used for smelling and feeling. Mouthparts are for either sucking or chewing. Mouthparts are the most variable of all insect characteristics. They are often used to determine the type of control measures that will be the most effective for a particular insect. The thorax is the locomotion segment of an insect.