Caddisfly (Trichoptera) records from Britain (excluding Northern Ireland and Channel Islands) up to August 2022 from the National Trichoptera (Caddisfly) Recording Scheme

The Trichoptera dataset was assembled by the UK Trichoptera (Caddisfly) Recording Scheme. The scheme is linked to those for Mayflies and Stoneflies under the umbrella of the Riverfly Recording Schemes which is one of the Biological Records Centre family of schemes. The data comes from a wide range of sources ranked in terms of contribution: volunteer recorders; statutory monitoring bodies, especially the Environment Agency; national and local entomological and natural history publications and ‘grey’ literature; museum collections; local record centres; consultants. The principal aim of the Caddisfly Recording Scheme is to collate all available caddis records to produce comprehensive distribution maps and conservation reviews. Several of the data sets it contains are independently submitted to the NBN and an effort was made to exclude those from this download. The data set contains duplicate records where the same record has arrived from different sources, e.g. as an entry in a collector’s notebook then as a collated list and possibly then as a published record. The data base is only set up to take data at up to 8 figure grid reference resolution but more detailed data is available for a few records and can be requested from the scheme organiser. Additional information about individual records is sometimes available and can be requested from the scheme organiser.