Erynnis

Schrank, 1801

duskywings, duskywing skippers

Erynnis is a of in the , commonly known as duskywings. The genus exhibits high in the Nearctic region, with also present across the Palearctic and Neotropical ecozones. Duskywings are -sized, fast-flying with dark, often or blackish that typically lack bright coloration. Many species are difficult to distinguish from one another and require examination of wing pattern details or for reliable identification.

Erynnis persius by no rights reserved, uploaded by Robbie Hannawacker. Used under a CC0 license.

Erynnis tristis by (c) John Hibbard, some rights reserved (CC BY), uploaded by John Hibbard. Used under a CC-BY license.

Erynnis by (c) Bill Bouton, some rights reserved (CC BY). Used under a CC-BY license.

Pronunciation

How to pronounce Erynnis: //əˈrɪn.nɪs//

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

Identification

Identification to level is notoriously difficult and often requires examination of the underside of the . Erynnis juvenalis has one or two dots on the hindwing that E. horatius lacks. E. propertius early in the season. E. brizo and E. funeralis can be distinguished by and markings. E. tages is a Palearctic species associated with grassland habitats. When possible, specimens should be compared with reference collections or expert-verified photographs.

Images

Habitat

Found in diverse including open woodlands, forest edges, prairies, glades, fens, riparian corridors, and grasslands. Specific habitat associations vary by ; some require oak woodlands, others prefer grasslands or wetland edges.

Distribution

Highest in the Nearctic ecozone (North America). Present across the Palearctic (Europe, Asia) and in the Neotropical ecozone. Specific distribution records include Denmark, Norway, Sweden, Vermont (USA), and other US states.

Seasonality

periods vary by and region. Erynnis juvenalis and E. horatius in early spring. E. propertius emerges early, with records from late January in California. E. horatius continues flying through summer. E. brizo appears in spring at lower elevations. E. funeralis is present in spring in the southwestern United States.

Diet

feed on various plants including oaks (Quercus), legumes, and other . Specific host associations vary by : E. brizo feeds on oak; E. funeralis likely uses legumes and other plants.

Host Associations

Quercus - larval Erynnis brizo and other
Fabaceae - larval Erynnis funeralis and others

Life Cycle

with , , , and stages. Larvae are leaf-rollers or leaf-tiers on plants. stage varies by ; some overwinter as pupae, others as partially grown larvae.

Behavior

Males of many exhibit territorial , perching on prominent objects and darting out to chase females or rival males. have rapid, erratic patterns typical of . Some species visit flowers for nectar; others are rarely observed nectaring.

Ecological Role

may serve as when visiting flowers. function as , consuming leaves of plants. The includes used as indicators of grassland health, such as Erynnis tages in European programs.

Human Relevance

Used as bioindicators for quality and , particularly in grassland assessment. The Grassland Index for Germany includes Erynnis tages as one of 15 . Some are of interest to butterfly watchers and photographers, though identification challenges limit recreational appeal.

Similar Taxa

Other Pyrginae skippersSimilar dark coloration and rapid ; distinguished by pattern details, preferences, and often requiring examination for definitive identification
Staphylus (scallopwings)Similar small size and dark coloration; scallopwings have distinctive margins and different
Systasea (powdered-skippers)Similar dark, muted appearance; powdered- have distinctive scaling and pattern

More Details

Conservation status

Erynnis tages (Dingy ) has shown significant decline in Germany between 2006 and 2023 according to the Grassland Index. Declines attributed to loss, fragmentation, intensive mowing, nitrogen inputs, and . Climate change increasingly affects distribution and abundance across the .

Taxonomic challenges

The is considered one of the most taxonomically difficult groups of North . Many are cryptic and require examination of or detailed pattern analysis. Some species pairs cannot be reliably separated from photographs of the wing surface alone.