How can beetles be recognized by their wings?

Beetles (order Coleoptera) are primarily recognized by their unique wing structure, which typically consists of two pairs of wings.1

The most distinctive feature is the front pair of wings, known as elytra. These are often thickened, leathery, or hard and brittle, serving primarily as protective covers for the body and the more delicate hindwings. When at rest, the elytra cover the mesothorax, metathorax, and most of the abdomen.12

The hindwings, located on the metathorax, are the functional wings used for flight. While many beetles possess powerful wings capable of sustained flight, there is significant variation across the order: some species have greatly reduced wings, and others are entirely wingless. Taxonomists use variations in the length, texture, and appearance of the elytra, as well as the specific pattern of veins in the wings, to help distinguish between different beetle groups.213