Common NameBruce's Chocolate-tipSeasonalityAdults are on the wing from May through early July.IdentificationA small (2.5-3.0 cm wingspan) dark grey-brown moth, darker and less contrastingly marked than the other Clostera species. It is most easily confused with small, dark specimens of C. apicalis. C. apicalis hase rusty-red or dark orange along the upper section of the postmedian line on the forewing; this is greatly reduced or absent in brucei. Clostera strigosa is larger with pale yellow mottling in the apical area, and C. albosigma has the dark terminal part of the forewing sharply divided from the remainder of the wing. Male antennae bipectinate; sexes similar.
Scientific NameClostera bruceiCommon Name
Bruce's Chocolate-tip
Habitat
Mature deciduous and mixedwood forest.
Seasonality
Adults are on the wing from May through early July.
Identification
A small (2.5-3.0 cm wingspan) dark grey-brown moth, darker and less contrastingly marked than the other Clostera species. It is most easily confused with small, dark specimens of C. apicalis. C. apicalis hase…
A small (2.5-3.0 cm wingspan) dark grey-brown moth, darker and less contrastingly marked than the other Clostera species. It is most easily confused with small, dark specimens of C. apicalis. C. apicalis hase rusty-red or dark orange along the upper section of the postmedian line on the forewing; this is greatly reduced or absent in brucei. Clostera strigosa is larger with pale yellow mottling in the apical area, and C. albosigma has the dark terminal part of the forewing sharply divided from the remainder of the wing. Male antennae bipectinate; sexes similar.
Life History
The adults are nocturnal and come to light. The larvae are reported to be both solitary and gregarious leaf-folding defoliators. There is a single brood each year.
Conservation
Uncommon to locally common and widespread; no concerns.
Diet Info
No specific Alberta data; elsewhere in Canada (including Alberta) Trembling aspen (Populus tremuloides), willow (Salix sp.) and Balsam poplar (Populus balsamifera).
Range
Across southern Canada, from Quebec to coastal British Columbia, north to Yukon and south to New Jersey and California. In Alberta found mainly in the southern Boreal forest and foothills areas, but also present in…
Across southern Canada, from Quebec to coastal British Columbia, north to Yukon and south to New Jersey and California. In Alberta found mainly in the southern Boreal forest and foothills areas, but also present in the aspen parklands.
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Citation
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Page Citation for Clostera brucei
Page Citation
"Species Details - Clostera brucei, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-2147. Accessed 31 Aug. 2024.
References
AuthorPrentice, R. M.
TitleForest Lepidoptera of Canada. (1962)
Publication Date1962
Volume2
Pages281
AuthorHandfield, L.
TitleLe guide des papillons du Quebec.
Publication Date1999
Pages536
AuthorForbes, William T. M.
TitleLepidoptera of New York & neighbouring states : Part 2
Publication Date1948
Series TitleCornell University Agricultural Experiment Station. Memoir
Pages263
Specimen Information
There are 88 specimens of this Species.
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88 results plotted on map in 34 markers. Note: Only records with latitude and longitude coordinates are plotted on map.
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Caribou Mountains Wildland Park, Wentzel LakeCollected BySchmidt, B. C.; Anweiler, G. G.Date Collected2003-06-12/2003-06-16
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Caribou Mountains Wildland Park, Wentzel LakeCollected BySchmidt, B. C.; Anweiler, G. G.Date Collected2003-06-12/2003-06-16
University of Alberta E.H. Strickland Entomological Museum
Place CollectedCanada: Alberta, Caribou Mountains Wildland Park, Wentzel LakeCollected BySchmidt, B. C.; Anweiler, G. G.Date Collected2003-06-12/2003-06-16