Common NameArched HooktipSeasonalityIn Alberta adults are on the wing from mid-May through late-July.IdentificationHooktips are medium-size broad-winged geometrid-like moths with the forewing apex drawn out into a prominent curved point. The Arched Hook tip (2.4- 4.0 cm wingspan) is yellow-brown or light tan. The forewings are crossed by a series of toothed fine brown lines, with a darker curved line running from the lower margin to the hooked apex, and with two small dark dots in the discal area. The outer margins of the forewings are smooth (toothed in D. bilineata). The hindwings are white or very pale yellow-brown, faintly and incompletely crossed by a series of fine light brown bands. The sexes are similar. The related Two-lined Hooktip (D. bilineata) has darker tan forewings with toothed margins, each crossed by only two fine dark brown lines. The hindwings are unmarked or nearly so. The Rose Hooktip (Oreta rosea) is darker and two-toned dark brown or purple-brown and yellow.
Scientific NameDrepana arcuataCommon Name
Arched Hooktip
Habitat
Deciduous woodland with birch or alder.
Seasonality
In Alberta adults are on the wing from mid-May through late-July.
Identification
Hooktips are medium-size broad-winged geometrid-like moths with the forewing apex drawn out into a prominent curved point. The Arched Hook tip (2.4- 4.0 cm wingspan) is yellow-brown or light tan. The forewings are…
Hooktips are medium-size broad-winged geometrid-like moths with the forewing apex drawn out into a prominent curved point. The Arched Hook tip (2.4- 4.0 cm wingspan) is yellow-brown or light tan. The forewings are crossed by a series of toothed fine brown lines, with a darker curved line running from the lower margin to the hooked apex, and with two small dark dots in the discal area. The outer margins of the forewings are smooth (toothed in D. bilineata). The hindwings are white or very pale yellow-brown, faintly and incompletely crossed by a series of fine light brown bands. The sexes are similar. The related Two-lined Hooktip (D. bilineata) has darker tan forewings with toothed margins, each crossed by only two fine dark brown lines. The hindwings are unmarked or nearly so. The Rose Hooktip (Oreta rosea) is darker and two-toned dark brown or purple-brown and yellow.
Life History
The Arched Hookedtip is nocturnal and comes to light. There is a single brood each year. The larvae are solitary defoliators.
Conservation
A fairly common widespread species; no concerns.
Diet Info
No specific Alberta data. Elsewhere in Canada reported to utilize White Birch (Betula papyrifera) and alder (Alnus sp.) as larval hosts (Prentice, 1963).
Range
Newfoundland to Vancouver Island, south to at least the Carolinas and California (?). In Alberta it can be found throughout the Boreal forest region, north to Bitumount and Zama, as well as in the foothills and…
Newfoundland to Vancouver Island, south to at least the Carolinas and California (?). In Alberta it can be found throughout the Boreal forest region, north to Bitumount and Zama, as well as in the foothills and mountain regions.
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Citation
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Page Citation for Drepana arcuata
Page Citation
"Species Details - Drepana arcuata, University of Alberta E.H. Strickland Entomological Museum." University of Alberta Museums Search Site, https://search.museums.ualberta.ca/g/2-2774. Accessed 15 Oct. 2024.
References
AuthorCovell, C. V., Jr.
TitleA field guide to the moths of eastern North America.
Publication Date1984
Pages496
AuthorPrentice, R. M.
TitleForest Lepidoptera of Canada. (1962)
Publication Date1962
Volume2
Pages281
AuthorIves, W. G. H. and H. R. Wong
TitleTree and shrub insects of the prairie provinces
Publication Date1988
Pages327
Specimen Information
There are 49 specimens of this Species.
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49 results plotted on map in 13 markers. Note: Only records with latitude and longitude coordinates are plotted on map.