Square-spot Rustic Caterpillar

Square-spot Rustic Caterpillar

Observation - Square-spot Rustic Caterpillar - UK and Ireland. Description: I was putting up post and rail fencing yesterday and when I picked up one of the rails and turned it over there were three of these caterpillars curled up on the underside.

I was putting up post and rail fencing yesterday and when I picked up one of the rails and turned it over there were three of these caterpillars curled up on the underside.