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Operophtera bruceata - female

Operophtera bruceata - Female
Kennebunk, York County, Maine, USA
November 25, 2010
Size: 0.8 cm
Probably the same species as this male found in the same area.

Moved from ID Request.

female Bruce Spanworm
The Winter Moth females have small wing buds, and Bruce Spanworm female lack these.

Is there any way to differentiate the male winter moths from the male bruce spanworms?

According to Jeff Boettner
from UMass, a researcher doing work with Winter Moths, "if anyone is wondering what you have at your porch lights now, if you look at the lower hindwing and see a black spot in the middle of the wing, these seem to always be Bruce spanworm. If you don't see a spot it gets tricky, ie a certain percentage of BS lack the spot, and winter moth lacks the spot. It is now in 6 states (ME, NH, MA, RI, CT and NY-Long Island)." And he goes on to say that the winter moth parasite, Cyzenis albicans that's been released 2 years ago are still being found. If you want the whole report he posted here it is on Masslep.

I will have to go check those males to look for
that black spot. By the way, if the female bruce spanworm has no wingbuds, then this one I found: should be a winter moth, right?

I'd say yes
I'm going by another post on Masslep from another researcher about how to identify these females.

Thanks again
for all your help.

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