An endangered Red Data Book species, in deciduous woodland and areas with scattered trees; 100-400 m (100-1300 m in Europe) in parts of southern England and Wales, with records north to Yorkshire; mainland Europe and southern Scandinavia. In Hampshire there are colonies in a few places such as Bentley Wood and Stockbridge Down. Intermittently recorded from the Isle of Wight, where less than annual in occurrence. Wingspan 36 mm. Larva feeds on Wych Elm.
Flightime guide |
Stage | J | F | M |
A | M | J |
J | A | S |
O | N | D |
Adult |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
Larval |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
|
|