InsectsInsects are cold blooded arthropods and represent 90% of all life forms on earth. They are among the most diverse groups of animals on the planet, with over 1 million different known species and as many as 9 million more yet to be discovered. Insects have three body parts: head, thorax and abdomen. They have three pairs of legs with six joints and they have two antennae. Bugs have external skeletons. These “exoskeletons” contain sense organs for sensing smell, sound, light, temperature, wind and pressure.
Most insects go through 4 life stages: egg, larvae or nymph, pups and adult. Bugs do not have lungs and most have compound eyes, meaning each eye has many lenses.
Adult insects usually move about by walking or flying...and sometimes by swimming. They are the only animals without backbones that fly. As it allows for rapid yet stable movement, many walk with their legs touching the ground in alternating triangles.