New Jersey Butterflies

Arogos Skipper

Atrytone arogos

Identification: Very small—FW ≥0.6". Sexes similar below. Above: Male FW orange with broad, blackish-brown trailing border. No stigma. HW has central orange patch with broad, blackish-brown borders. Female FW has smaller orange patch than male, with a dark, stigma-like line paralleling the leading edge. NOTE: Arogos Skippers rarely bask with wings open, so upperside is usually difficult to see. Below: Both wings are medium-orange, unmarked except for pale veins on HW, and have pale fringes. Similar skippers: Delaware Skipper is brighter orange below, lacks pale veins, and has orange fringes. Delawares often bask, displaying black veining on upper surfaces and extensive dark FW marks on female.

NJ Status and Distribution: Resident. Endangered in NJ. In NJ, occurs as two distinct populations. Northern NJ population confirmed by photo only in Randolph/Roxbury Townships, Morris County. Southern NJ population known from the McGuire/Ft. Dix military installations in Burlington County.

NJ Range Map-Arogos Skipper

Habitat: Northern NJ population: Dry upland fields and powerline ROWs with Little Bluestem grass and nectar sources. Southern NJ population: Seasonally wet, savannah-like areas with Pine-Barren Sand-Reed, a species that may appear following wildfires.

Flight Period: Northern NJ population: Late June—mid-July. Extreme dates: Northern NJ population 6/30—8/2; Southern NJ population: Late July—mid-August. Extreme dates: unreported.

Larval Food Plants: Northern NJ population: Little Bluestem grass (Schizachyrium scoparium). Southern NJ population: Pine-Barren Sand-Reed (Calamovilfa brevipilis).

Overwintering Stage: Larva.

Best Locations: Known locations are not accessible to the public.

Comments: Investigation may reveal that the 2 NJ populations are, in fact, separate species. Even experienced butterfliers have misidentified worn European and Delaware Skippers as Arogos, so if you think you have one, be sure to get a photo!

Arogos Skipper

Female, Morris Co., NJ, 6/29/11, on Oxeye Daisy.

Arogos Skipper

Morris Co., NJ, 7/5/02, on Common Milkweed.