Caterpillar of the Common Buckeye Butterfly. It is feeding on an Indian Paintbrush (Castilleja indivisa) wildflower plant.
1-3/4" wing span. Common at Bouverie.
Pretty tattered, but looks identical to other photos of the Common Buckeye
The common buckeye or simply, buckeye, (Junonia coenia) is a butterfly in the family Nymphalidae. It is found in southern Manitoba, Ontario, Quebec, and Nova Scotia and all parts of the United States except the northwest, and is especially common in the south, the California coast, and throughout Central America and Colombia. The sub-species Junonia coenia bergi is endemic to the island of Bermuda.