Anatrytone logan

(Edwards, 1863)

Delaware Skipper

Anatrytone logan, commonly known as the Delaware skipper, is a North American grass in the Hesperiidae. It ranges from the southern Canadian Prairies and southern Ontario through the midwestern and eastern United States. The exhibits sexual monomorphism in coloration, with both sexes displaying yellow-orange wings with black borders and dark brown venation. It is multivoltine in warmer regions and in northern areas, with larval development dependent on native grasses.

Anatrytone logan by (c) Bex Goreham, some rights reserved (CC BY), uploaded by Bex Goreham. Used under a CC-BY license.

Anatrytone logan by (c) Laura Gaudette, some rights reserved (CC BY), uploaded by Laura Gaudette. Used under a CC-BY license.

Delaware Skipper (Anatrytone logan) (9290210620) by Aaron Carlson from Menomonie, WI, USA. Used under a CC BY-SA 2.0 license.

Pronunciation

How to pronounce Anatrytone logan: /ˌænəˈtraɪtoʊn ˈloʊɡən/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

The Delaware skipper can be distinguished from similar orange skippers by its broad black wing borders and the nearly unmarked yellowish-orange underside. The absence of spots or bands on the wing surface separates it from many and related grass skippers such as Ancyloxypha numitor (least skipper), which has more extensive dark markings below. The dark brown venation is prominent on both wing surfaces. Specimens from northern may appear slightly smaller and darker.

Images

Habitat

Occupies moist including marshes, wet meadows, prairie swales, and damp residential landscaping. Associated with areas supporting native warm-season grasses required for larval development. Tolerates disturbed and semi-urban environments where grasses persist.

Distribution

North American ranging from southern Canadian Prairies and southern Ontario southward through the midwestern and eastern United States. Records include Vermont and surrounding regions. Absent from western North America.

Seasonality

Active February through October in warmer southern regions with multiple produced annually. Restricted to a single summer brood in northern portions of range. timed with flowering of nectar sources.

Diet

feed on nectar from flowers, particularly pink and white including milkweeds (Asclepias), mountain mints (Pycnanthemum), and thistles (Cirsium). Larvae feed on grasses including big bluestem (Andropogon gerardii) and switchgrass (Panicum virgatum).

Host Associations

Andropogon gerardii - larval Big bluestem, native prairie grass
Panicum virgatum - larval Switchgrass, native warm-season grass

Life Cycle

Multivoltine in southern range (multiple February–October); in north (single summer brood). Complete with , larval, pupal, and stages. Larval development occurs on grasses; site not well documented but presumed to be in grass litter or loose soil.

Behavior

are and visit flowers for nectar. is rapid and low, typical of grass skippers. Males likely perch to await females, though specific territorial not documented. Multiple in warm climates suggest extended reproductive season with overlapping .

Ecological Role

function as of flowering plants, particularly milkweeds and mints. Larvae are herbivores that process native grass , contributing to nutrient cycling in prairie and marsh . Serves as prey for including birds, spiders, and predatory insects.

Human Relevance

Occasionally observed in gardens and residential areas where moist conditions and native grasses are maintained. Not considered economically significant. Subject of citizen science observation through platforms such as iNaturalist.

Similar Taxa

Ancyloxypha numitorLeast skipper is smaller with more extensive dark markings on underside and different wing proportions.
Hesperia spp.Branded skippers typically show checkered or spotted undersides and more erratic patterns.
Polites spp.Related grass skippers often have more complex spotting and narrower wing borders.

More Details

Taxonomic note

Originally described as Hesperia logan by Edwards in 1863; later transferred to Anatrytone. Some sources list Atrytone delaware as a synonym or alternative combination.

Conservation status

Not formally assessed by major conservation authorities; appears secure throughout core range based on iNaturalist observation frequency.