May to September. Britain and Ireland. Small green moth, fades to yellow or white as moth ages. Found in a wide range of habitats, including gardens, open woodland and chalk downland.

When freshly emerged the green colour of the forewing, combined with the wing markings, help to distinguish this moth from most others. This green colour fades to yellowish, whitish or even pinkish white with age.

The adults are easily disturbed by day. Often seen flying from just before dusk, also flies into the night. Sometimes common where it occurs. The larvae can be found June to July and September to the following May where there are two generations and from August to the following May where there is one generation.