Cossus

Cossus is a genus of moths in the family Cossidae, commonly known as carpenter moths. These moths are characterized by their large size, robust bodies, and stout antennae. The larvae of Cossus moths are wood-boring, feeding on the wood of various trees. This wood-boring behavior can sometimes cause damage to timber and even living trees, though their impact varies depending on the species and the host tree.

The life cycle of Cossus moths typically involves a long larval stage that can last for several years within the wood. Once the larva is fully grown, it pupates inside the tree, eventually emerging as an adult moth. Adult Cossus moths are usually short-lived, focusing their energy on reproduction. They are often nocturnal or crepuscular, meaning they are active at dawn and dusk.

Several species are found within the Cossus genus, with distribution across various parts of the world, including Europe, Asia, and North Africa. One well-known species is Cossus cossus, the goat moth, named for the strong, unpleasant odor emitted by its larvae. The larvae of Cossus moths have historically been used as a food source in some cultures. The genus is of interest to entomologists studying insect-plant interactions and the ecology of wood-boring insects.