1648 Pebble Hook-tip Drepana falcataria
(Linnaeus, 1758)
Wingspan 27-35 mm.The largest and commonest of the 'hook-tips', found over most of Britain in woodland and heaths.
The adults fly at night from May to June and have a second brood in August.
The larvae feed usually on birch (Betula), but sometimes on alder (Alnus glutinosa).