What are the features of an insect?

1. Insects are arthropods, animals that lack backbones and have jointed legs and external skeletons, or exoskeletons. Arthropods include such diverse animals as roaches, millipedes, tarantulas, and lobsters. 2. Insects have three distinct body parts: a head, a thorax, and an abdomen; many other arthropods have either more or fewer body areas. 3. All insects have two antennae and six legs. Most other arthropods have eight or more legs. 4. Almost all insects have wings. No other group of arthropods can fly. Insects are truly amazing. Their tiny size, quick reproduction rate, and ability to fly enable insects to explore and exploit almost every environmental niche imaginable.