A small family of about 200 species worldwide, with ten in Europe, nine of which are resident in the British Isles. Superficially, members of this family resemble the noctuid moths, although they are slightly slimmer in build and all hold their wings close to the body when fully at rest. The thorax often has prominent tufts. The larvae of Peach Blossom and Buff Arches feed exposed, whereas the remainder of the group conceal themselves between spun leaves. Pupation occurs either on or under the ground, or between leaves of the foodplant which then fall to the ground. Most overwinter in this stage.
(Taken from Waring and Townsend’s Field Guide to the Moths of Great Britain and Ireland)