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could also be H. digitatus.Whichever he is,he is a beautiful Caperer.
At this stage I have to add that you are right to post what you did here, also that my response below is highly questionable.
The exact species of this caddis is maybe not just as easy to establish as I thought, using the photograph alone.
I think you are right and this insect probably is one of either H. digitatus or H. radiatus. Maybe in time we might be able to establish which it is but my 'confident ID' is very much in question.
Theres a difference in the structure of the wing veining, its different enough to differentiate, it does take a good look though.
Hard to explain in words, would be very boring and difficult for me to convey well!!!
can enlighten me some evening when we are waiting for them or something else to hatch.That should give you plenty of time and incentive ha ha!
The prominent dark marked part of the centre of the wing is the place to look for the differentiation, the rear edge of 2 particular 'section' of the wing which are directly one on top of the other, on radiatus its virtually vertical and a straight line but in digitatus its not straight and each 'section' has different rear end, the upper one is arched backwards.
You see, I knew it would sound like gibberish, sorry.
I have only known the difference for almost exactly 19 hours.
Prior to posting this chap last night I compared illustrations in that little freshwater life book I mentioned!
I'll get you to put me over it again sometime. Like when your trying to put a size 22 into the open mouth of that 5lber at the edge of the reed bed and him suckin down Caenis in a flat calm when the Midges are at you.That'll be just the right time, it'll help take your mind off things!!
inopinatus' advice and ordered the Caddis and Ephemeroptera booklets from the FSC and when that new book he was talking about comes out I'm getting that too!!
I'll be doing the same soon also. The links Inopinatus posted on the other thread are very good too.
Lat/Lng: 54.989, -6.118
OS grid ref: NW366738
Small upland stream flowing from lake.