Caddisfly (Trichoptera) records from Britain (excluding Northern Ireland and Channel Islands) up to the end of 2020 from the National Trichoptera (Caddisfly) Recording Scheme

Quality Control

All records that are not indicated as unconfirmed are to be regarded as accepted. The Recording Scheme is interested in almost any caddis record but then applies a verification procedure with records that fail not being added to the data set sent to the NBN. Standard procedures are used for record validation. Verification procedures differ between records. The following suggests records that will be accepted:- a voucher specimen in the form of a specimen or photograph submitted to the recording scheme; a record from a person known to have submitted accurate records in the past as recorder or identifier; a species that at the time of the record was easy to identify using easily available identification works and is fairly common within its previously known range. A record that fails the criteria will be noted for further investigation before it is accepted. They may be added but marked as unconfirmed if they seem possibly correct but cannot be confirmed. Records that seem implausible are not submitted to the NBN.

Method steps

1. A wide range of methods were used by recorders to obtain their data.

Data comes from England, Scotland, Wales and the Isle of Man. Northern Ireland and the Channel Islands are not covered.