Duncan Mcewan / Caterpillar larva of Grey Dagger (Acronicta psi) Scotland, UK

Duncan Mcewan / Grey Dagger moth (Acronicta psi) camouflaged on tree trunk, Scotland, UK

Duncan Mcewan / Grey dagger moth (Acronicta psi) larva / caterpillar on birch tree twig, UK

Robert Thompson / Grey dagger moth (Acronicta psi) camouflaged on branch, Brackagh Moss NNR, Portadown, County Armagh, Northern Ireland, UK, June

Georgette Douwma / Grey dagger moth (Acronicta psi) caterpillar resting on a leaf, UK. September.

Chris Mattison / Grey dagger moth (Acronicta psi) camouflaged on lichen, Gwynedd, Wales, UK. July.

Chris Mattison / Grey dagger moth (Acronicta psi) resting on wood, August, Catbrook, Monmouthshire, Wales, UK.