nightfly's picture

Copper Underwing

Observed: 11th September 2013 By: nightflynightfly’s reputation in Invertebratesnightfly’s reputation in Invertebratesnightfly’s reputation in Invertebratesnightfly’s reputation in Invertebratesnightfly’s reputation in Invertebrates
12 Septmbr 13 (18)
CIMG5001
CIMG5002
12 Septmbr 13 (9)
Description:

As pointed out by Robert (see comments), my initial underside photo didnt provide enough view of the nature of the underside of the hindwing to state which Copper Underwing species this was.
2 more images added(13 Sept) showing a bit more of the underside of the important area of inner hindwing. I hope this is ok for deciding this is Copper Underwing and not Svensson's C.U. as its tricky getting such a shot without damaging the insect, this one is absolutely fine, it was chilled for the pics and it worked well.
You were absolutely right Robert, its simply not possible to see enough of the correct area of wing if the wing is not extended.

Identifications
Species interactions

No interactions present.

Species with which Copper Underwing (Amphipyra pyramidea) interacts

Comments

RHoman's picture

Copper Underwing ID

The moth shown above cannot be identified to species level even from the 2nd picture. The hindwing must be extended in order to see the full extent of the copper coloured area. Have a look at
http://www.mothscount.org/uploads/Difficult_species_guide_page_70.pdf

from the BC Moths Count difficult species booklet. The key sentence is "Examination of a resting moth from underneath in a transparent pot can be misleading, as they normally
sit with the hindwing creased so the full extent of the copper suffusion may not be visible"

Robert Homan

nightfly's picture

Hi Robert,Thanks for your

Hi Robert,

I have edited a previous longer comment trying to explain how I had looked at the underside of the moth when full at rest with wings tightly closed and then noticed a difference when the moth had begun to quiver its wings when preparing for flight. It was an attempt to defend my suggestion that the contrast in colour ether side of the dark crossline was sufficient for a good ID due to the wings in the 2nd pic not being fully tightly closed and at rest.

While the aforementioned crease didnt seem to be there when the moth was quivering in preparation for flight, as above, I take your point and I'll try today to add a better view of an extended hindwing as this is as you say needed to be decisive.

Cathal.

nightfly's picture

I agree the wing needs to be

I agree the wing needs to be extended for a decisive ID and I will try to achieve that. Following your comment I looked again at the illustrations of the underside of the hindwings in Waring and there is a contrast in colour either side of the dark crossline in both species so an extended wing is necessary as you say.

Cathal.