Printed

Adult Caddis (Trichoptera) of Britain and Ireland: a practical guide Ian Wallace, Sharon and Peter Flint (Field Studies Council 2022) 

A Revised Key to the Caseless Caddis Larvae of the British Isles with notes on their ecology by John M. Edington  & A.G. Hildrew (The Freshwater Biological Association 1995)

Guide to the adult caddisflies or sedge flies (Trichoptera) (FSC Fold-out chart 2008)

The Adult Trichoptera (Caddisflies) of Britain and Ireland by Peter C. Barnard and Emma Ross (RES Handbook Vol 1 Part 17 2012)

Keys to the Case-bearing Caddis Larvae of Britain and Ireland by I.D. Wallace, B. Wallace & G.N. Philipson (The Freshwater Biological Association 2003)

Simple Key to the Caddis Larvae by Ian Wallace (FSC Aidgap. 2006)

Websites

The Beginner’s Guide to Caddis (Order Trichoptera) by Ian Wallace

Google Lens: Go to google.com and there is a camera icon at the right of the search bar. Click on this, and you can drag and drop any image and it will do its best to identify it – so can be used for any flora and fauna, vertebrates and invertebrates etc. (as well as buildings, landscapes – anything, in fact.)  Worth a look, but treat identifications with caution!

Apps