leatherjacket

A leatherjacket is the common name for the larva of certain insects, most notably the crane fly. These larvae are characterized by their tough, brown skin, which gives them their name.1

Crane fly larvae typically inhabit damp environments and feed on decaying plant matter. However, some species can be carnivorous or damage the roots of crops like cereals and grasses. After feeding throughout the winter, they enter a resting stage in the spring before emerging as adult crane flies. Crane flies themselves are harmless, slow-flying insects with long legs, often found near water or vegetation.1

It is important to note that "leatherjacket" can also refer to certain types of fish, specifically filefish and some species of the genus Oligoplites. Additionally, in Australia, the term can denote specific trees with tough bark or a type of pan-fried or baked cake.2