Erynnis pacuvius

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Pacuvius duskywing
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Hesperiidae
Tribe: Erynnini
Genus: Erynnis
Species: E. pacuvius
Binomial name
Erynnis pacuvius
(Lintner, [1878])
  • Nisoniades pacuvius Lintner, 1878
  • Thanaos pacuvius Godman & Salvin, [1899]

Erynnis pacuvius, the Pacuvius duskywing, Dyar's duskywing or buckthorn dusky wing, is a skipper butterfly of the family Hesperiidae. It is found in most of the western United States and in southern British Columbia.[1]

The wingspan is 29–33 mm. The flight period is between June and July in the north with a second generation in the south.[1]

The larvae feed on Ceanothus species.[2]


  1. ^ a b Pacuvius Duskywing, Butterflies of Canada
  2. ^ Erynnis,

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