144997 Silver-spotted Skipper Hesperia comma Wingspan 34mm. An iconic butterfly that is restricted to chalk downland. Adult recalls a Large Skipper but the dark brown upperwings have distinctive pale spots; the greenish-brown underwings have silvery-white spots after which the species is named. Flies August-September. Larva is nocturnal and feeds on grasses. Very local in southern England, and only on chalk downs.