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Species Page - Cercyonis pegala
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scientific name    Cercyonis pegala    

common name     Common Wood-nymph

Grasslands, meadows, pastures and roadsides throughout most of Alberta except the boreal.

The single yearly flight peaks in early July to early August.

The upperside is an even, dark chocolate brown with two dark (often white-pupilled) forewing eyespots, with two or three hindwing underside spots (sometimes a complete row). The eyespots are better-developed on the underside, which has fine, dark striations and a vague median line. Females are larger and paler, often with a more pronounced pale patch surrounding the eyespots dorsally. There is no orange surrounding the dorsal forewing eyespots as in eyed Erebia species. C. oetus is similar, but pegala never has the upper forewing spot larger than the lower one, is slighlty larger overall, and often has blue scales in the forewing underside spots. Subspecies ino, named from Calgary, reportedly describes all Alberta populations (Bird et al. 1995).

life history
Immature stages of western Canadian populations are undescribed. Guppy & Shepard (2001) illustrate a grown larva and pupa from south-central BC. Larvae overwinter in the first instar (Layberry et al. 1998). The most widespread and common satyrine in the province.

Not of concern.

diet info
Larval hosts are unrecorded in western Canada, primarily reported to be grasses elsewhere, including wild oats (Avena fatua) (Layberry et al. 1998). Unlike most satyrines, adults (particularly females) are avid flower visitors and frequent thistles and alfalfa (Klassen et al. 1989, Bird et al. 1998).

BC and Alberta south to CA and AZ, east across the continent to the east coast (Layberry et al. 1998).

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References (4)
Specimen Info
There are 26 specimens of this species in the online database
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Adult Seasonal Distributioncreate a collection histogram with specimens
Specimen List (26)


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