Pyrgus orcus, commonly known as the Orcus skipper, is a small butterfly belonging to the family Hesperiidae. It is found in various parts of North America, including the western United States and parts of Canada. The Orcus skipper has a wingspan of about 2.5 to 3 centimeters and displays a distinctive pattern of dark brown wings with white spots. It is known for its rapid and erratic flight behavior.