Milkweed tussock moth
Milkweed tussock moth, Rondeau Provincial Park, August 2, 2023. Evidently a swarm of caterpillars is unusual for this species. Leave it to Anne to find something like this. Euchaetes egle, the milkweed tiger moth or milkweed tussock moth, is a moth in the family Erebidae and the tribe Arctiini, the tiger moths.