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Photo#1474764
Fall cankerworm moth  [Wingless]  (Alsophila pometaria) - Alsophila pometaria - female

Fall cankerworm moth [Wingless] (Alsophila pometaria) - Alsophila pometaria - Female
Rochester Twp, Beaver County, Pennsylvania, USA
December 7, 2017
Size: ½" inch/12mm
33°F/0°C 70%Hu Cold, Windy & dry.

Images of this individual: tag all
Fall cankerworm moth  [Wingless]  (Alsophila pometaria) - Alsophila pometaria - female Fall cankerworm moth  [Wingless]  (Alsophila pometaria). - Alsophila pometaria - female

Moved
Moved from ID Request.

 
Just wondering how you were
able to determine that this is Alsophila pometaria and not Operophtera bruceata; I'm having trouble distinguishing the wingless female geometrids...any guidance you can provide would be much-appreciated!

 
It's hard to be sure
If you don't catch them mating or laying eggs, they look almost exactly the same.
Some of the female Operophtera bruceata have legs with more dark banding, but it may be hard to see that.

 
Thanks Bob-
I will be sure to check for leg colouration when I next find a specimen!

 
ID of this Moth…
0.02¢. Well, the Operophtera brumata is an introduced species & most common in inclement regions such as Nova Scotia, Northern Canada... https://bugguide.net/node/view/247161/data . They are darker to absorb more heat, they have dark "spots" on the side whereas the Alsophila pometaria has smaller "dots", is more mottled with gray & is within climate region. https://bugguide.net/node/view/35918/data.I hope 🙏 this helps

 
Be Careful
The Bruce Spanworm Moth, Operophtera bruceata and the Winter Moth, Operophtera brumata are two different species. The females of Operophtera brumata have short, vestigial wings.
More information and example images can be found on the page for Wingless Female Geometrids.

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