Insects are a large class of arthropods, which are bugs. There are over one million different species of insects, and all insects are easily identifiable because they have three distinct body sections, six legs, two antennae and a thin exoskeleton. Almost all insects lay eggs, but there are a few exceptions.
Insects that lay eggs include nearly all insects. Some examples of egg-laying insects are butterflies, bees, moths, crickets, stick bugs, house flies, dragonflies, beetles, ladybugs, ants and wasps.
Insect eggs are deposited by adult insects in a safe location, usually on the underside of leaves. The eggs are usually sticky, so they can hang on to the surface without falling off. Insect eggs can all look different. Some are colorful to warn predators to stay away, and others are camouflaged.
Most insects go through a similar life cycle. First, the adult insect will lay an egg. The insect will then hatch and continue to grow. When it hatches, the baby insect is a larva, which can sometimes look like a little worm instead of like its adult self. The larva will then pupate into an adult insect. How an insect pupates is determined by species. For example, a caterpillar is the larva stage of a butterfly, which pupates in a cocoon and emerges as an adult butterfly. Other larvae may slowly grow wings and legs, gradually turning into adult insects.
As the majority of insects lay eggs, there are only a few exceptions. Insects that don't lay eggs include aphids, one species of fruit fly and some cockroach species. These insects are viviparous, which means they give birth to live pupa.
Oviparous Versus Oviviparous
Egg-laying insects are called oviparous. Some inspects incubate their eggs inside of them and then lay eggs that hatch quickly, and these insects are called ovoviviparous.