What is a physical characteristic of an earwig?

The physical characteristic that best identifies an earwig is the presence of curved pincers. These unique pincers, which are actually modified cerci, are located at the rear of the body and serve multiple purposes, including defense and mating. The distinctive shape and placement make them a key identifying feature of earwigs, allowing for differentiation from other insects.

While earwigs do have a long, slender body, it is not their most defining characteristic compared to their pincers. Similarly, semi-transparent wings can be present but are not always visible, and they do not serve as a primary identifying feature of the species. Brightly colored antennae are also not characteristic of earwigs, as their antennae are typically slender and not brightly colored. Thus, the curved pincers stand out as the most distinctive physical feature that accurately represents earwigs.