General comments: Ubiquitous.
The Square-spot Rustic was reported as 'Common in all districts' by Foster (1937) and the same situation applies today. Caterpillars can be collected easily by sweep-netting the tops of grasses about two or three hours after darkness on dry nights in March Recorded in 38 (93%) of 41 10k Squares. First Recorded in 1887. Last Recorded in 2023. |