To light. Whippendell Woods, Watford, Herts. 12 xi 2016.

To light. Chorleywood: VC 24. 24 viii 2010.

adult emerged 13.6.19 - from larval spinning on birch - Chorlton Ees, Manchester - 29.4.19

adult emerged 13.6.19 - from larval spinning on birch - Chorlton Ees, Manchester - 29.4.19

Bramfield Woods, Hertfordshire, July 2019

Grasmere, Cumbria - 21.8.18

On Betula, Hartlebury Common, Worcestershire, 19th May. Pupated 1st June, adult emerged 11th August.

On Betula, Hartlebury Common, Worcestershire, 19th May. Pupated 1st June, adult emerged 11th August.

mid-instar larva larva 2.5.15 - from feeding signs on birch, Chorlton Water Park, Manchester - 19.4.15

penultimate instar larva larva 7.5.15 - from feeding signs on birch, Chorlton Water Park, Manchester - 19.4.15

final instar larva larva 9.5.15 - from feeding signs on birch, Chorlton Water Park, Manchester - 19.4.15