Which insects are an example of incomplete metamorphosis?

Incomplete metamorphosis is a developmental life cycle that includes three stages: egg, nymph, and adult. Insects that undergo this type of metamorphosis do not have a distinct pupal stage; instead, the nymphs resemble smaller versions of the adults but lack fully developed wings and reproductive structures. As they grow, nymphs go through several molts, gradually developing these adult features.

Aphids are an example of insects that exhibit incomplete metamorphosis. They go through these distinct stages, where the nymphs look similar to the adults, allowing them to engage in similar behaviors and feeding habits early on. The gradual transformation is a key characteristic of this life cycle.

In contrast, beetles, flies, and moths undergo complete metamorphosis, which involves four stages: egg, larva, pupa, and adult. This process includes a larval stage that is very different from the adult form, as seen in beetles (larvae are grubs), flies (larvae are maggots), and moths (larvae are caterpillars).