This new checklist covers all the recorded UK species. The main list comprises resident and transitory species, species believed to be extinct and immigrants and some species that have probably been imported but have also been found in the wild. Also included, in Appendix A, are the adventive species recorded in Britain. Appendix B lists species whose records are either erroneous or unconfirmed.
D.J.L.Agassiz, S.D.Beavan & R.J.Heckford, RES, 2013