Thursday, 3 April 2008

Unknown Eriocrania

This Eriocrania species appeared last night in the light trap, anybody able to tell which one it is? (sorry the photo is rather poor)


7 comments:

Paul Talbot..aka Moffman said...

Eriocrania subpurpurella. You will get thousand per night if trapping near Oak. In a few weeks time when Oaks are in leaf if the weather stays OK you will seem the leaf mines of this species on almost every leaf on some trees. The mines look like large "blisters" and impossible to miss. Find a well mined Oak and tap the branches or trunk and thousands of adults fly out. Stunning litle moths when looked at though a hand lens

charly streets said...

If the purple is an accurate representation then I would have thought that would have ruled out subpurpurella?? There are a couple of other species with a more purple ground colour and have an earlier flight period - Mar./Apr rather than Apr./May.
Do you still have the moth - if so I wouldn't mind having a look as all I ever get are subpurpurella.

Charly.

Paul Talbot..aka Moffman said...

Hi Charly
I wouldn't disagree with your comments but the image is not showing as purple on my screen, just brownish with flecs of purple/blue ? I am having various ISP problems at the moment due to Virgin Media doing an update to the lines. This has left me with either weak internet connections or not at all this week. I keep losing bites of data so all images are appearing slowly or of poor quality at busy times of the day. If I do not respnd to anything on this forum its probably because I am offline.

The only other species I think it could be if it has a ground colour of purple is either cicatricella or sangi(both around now and on Birch I think ?)and if you want to dissect to confirm bloody good luck to you mate, my eyes aint that good :-)) My pick would be sangi

charly streets said...

Hi Paul,
Interesting in what you say about the colour on your monitor, on mine the outer part of the wing is bright pink through to purple on the middle,through to a dark blue/purple on the base of the wing, it'll be interesting to see what others can see.
I only wanted a look at the moth to see if I could get a better photo of it to help with the ID, plus I've never seen a "purple" eriocrania before.I didn't know if it was chilling out in his fridge or not.
As regards gen det-ing, I wouldn't know one eriocrania's dangly bits from another ;-)

Charly.

AndyC said...

It looks good for Sangi,but its never easy with photos.I always click on the photo it gives a larger pic and then cross reference with UKmoths

Paul Talbot..aka Moffman said...

At last I appear to back online at full strength,thanks to helpful tech guy at Virgin I can now see the photo clearly and managed to enlarge it properly. It is definately showing a mainly purple background colour on the forewings now, so I think its E.sangi. I hope you kept the moth as this is a new Calderdale record if confirmed. I have not recorded this species so I would prefer to send a photo to a mate who does record this for his opinion.

drepana said...

well, this post has caused quite a debate which is most welcome, I will try and summarise my answers to all your queries as follows -
a) (All) Colour in photo is true, purple ground colour (but all over wing) silver speckles and spot.
b) (Charly) I did not keep the moth
c) (Paul) Being relatively new to all this there were hundreds of Eriocrania at one point last summer, I managed to capture 1 in a photo and it is an E. subpurpurella (quite different)will be looking for mines this year
d) (Andy and all) Yes Sangii looks favourite after uk moths comparison. (Paul) But is this enough for a positive id and therefore a new Calderdale species.
e) On the loook out for more of the same

Many thanks for all these comments

Winston