Well, inside a hide
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Being as I wasn't prepared to go further than "Caddis Fly" I'm pleased to get this much. I don't know that much about them, I really need to look into them. There's just so much to learn, and so little time! And it's all so damned INTERESTING...
There certainly is. The Field Studies Council have a fantastic fold out photographic guide to the families, and some species, of adult caddis - I believe its only about £4 so well worth a punt. There's also a detailed RES Handbook that's just come out this year with all of the species in it.
Limnephilus marmoratus a very common lake species - one with the spiky log cabin type of larval case.
Ian Wallace, UK Trichoptera Recording Scheme
Lat/Lng: 52.29034, -0.33091
OS grid ref: TL139671