Of the 400 or so species worldwide, only eight occur in Europe. They have broad wings and slender bodies, like geometrid moths to which they are closely related. Six are resident in the British Isles and a seventh is an occasional migrant. On all but one of these, the tips of the forewings are strongly hooked. Some rest with their wings in a rather tent-like position, others hold them flat to the surface. They are sometimes disturbed by day from among the foliage of the larval foodplants, or netted on the wing at dusk. However, they are most frequently encountered in light-traps, to which they come quite regularly, but usually in small numbers. Some adults are able to feed, but have a rather short tongues and do not visit flowers, and are only occasionally attracted to baits, aphid honeydue and oozing sap. The larvae of all the British species feed on the foliage of trees and shrubs. The females attach the eggs to the leaves, either singly or in rows. The hind pair of claspers of the larvae are pointed and the tail end is held in a characteristic raised position. Pupation takes place in a slight cocoon, spun between leaves of the foodplant. The cocoon drops with the leaves to the ground in the overwintering generation.
(Taken from Waring and Townsend’s Field Guide to the Moths of Great Britain and Ireland)