Scientific name: Alsophilia aescularia
Late January to April. Common and found throughout mainland Britain except on high ground. Only the males have wings, the wingless females can be seen crawling on tree trunks.
The males have triangular grey-brown forewings with dark-edged jagged crossbands which are distinctively held overlapping at rest. The females are completely wingless with a barrel-shaped body and a tuft of hairs on the end of the abdomen. The adult males flay after dark and are attracted to light.
The light green caterpillars can be found from late April to June overwintering as pupae in a fragile cocoon under the ground.
Size and Family
- Family – Alsophilinae
- Medium Sized
- Wingspan Range – 32-38mm
- UK BAP: Not listed
Caterpillar Food Plants
Oaks, Hawthorn (Crataegus monogyna), Blackthorn (Prunus spinosa), Crab Apple (Malus sylvestris), willows, Field Maple (Acer campestre), birches and other broadleaved trees and shrubs
Open woodland and also parks and gardens where the foodplants grow
- Countries – England, Wales, Scotland and Ireland
- Common and well distributed throughout most of mainland Britain. Found locally in Ireland, the Isle of Man and the Channel Islands.