What structure, often found in moths, physically links the forewing and hindwing together during flight?

Answer

A bristle mechanism

Many moths possess a frenulum, which is a bristle mechanism that locks the forewing and hindwing together, allowing them to operate as a single aerodynamic surface.

What structure, often found in moths, physically links the forewing and hindwing together during flight?
animalinsectclassificationmotharthropod