Scilly's Nature Scilly's Special Species Comma An uncommon butterfly in Scilly, the Comma is a master at camouflage, with its ragged outline resembling a torn leaf and the caterpillar resembling a birds dropping – who’d want to eat that? This handsome butterfly gets its name from the comma shaped white marking on its underwing. It is usually solitary and often seen basking in the sunshine & returning to a favourite perch point. Its larval food plants in Scilly are Elm and Nettles. Eggs are often laid in April with caterpillars through May and into June and then adults emerging from the chrysalis in June and July. If conditions are right there can be a second brood in August and into September.