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Species Page - Drasteria hudsonica
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scientific name    Drasteria hudsonica    

common name     Northern Arches

habitat
In or near dry, open coniferous woods.

seasonality
Adults fly in June.

identification
The forewing is mottled shades of grey, with a pale white-grey antemedian (AM) and postmedian (PM) band. The PM band is often chestnut brown. Prairie populations are dimorphic, with females exhibiting a comparatively uniform, unbanded light grey forewing. The hindwing is cream white with a wavy black PM and arginal band. The black discal crescent is joined to the PM band. Similar to D. petricola, but slighlty larger and lacks the black veins of the ventral forewing margin. The nominate susbspecies occurs in the boreal and mountain region, while heathi occurs in the prairies. These two may be different species, more work is needed in areas where the ranges overlap or abutt.

life history
Adults are day-active, but also come to light.

conservation
Not of concern.

diet info
In Alberta, larvae of the mountain populations feed on Buffaloberry (Sheperdia canadensis) (Prentice 1962).

range
Alaska to Manitoba, ND, SD, and NE south to NM in the Rockies (Richards 1939).

quick link
http://entomology.museums.ualberta.ca/searching_species_details.php?s=2912



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References (1)
Specimen Info
There are 134 specimens of this species in the online database
Map Distribution
Adult Seasonal Distributioncreate a collection histogram with specimens
Specimen List (134)
Related Links
Moth Photographers Group

 

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