Cossidae (Leopard & goat moths)

This family consists of about 700 species, of which three are found in the British Isles. The wings are elongated and held at a slight angle close to the body when at rest. The antennae are variable and the abdomen is extremely long in some species. The adults are nocturnal, and are incapable of feeding. The females attach the eggs to stems of the host plant. The larvae feed in the wood and stem tissue of trees and other plants, often taking more than one year to complete their growth. Most pupate within the food plant. (Taken from Waring and Townsend’s Field Guide to the Moths of Great Britain and Ireland)