Comparison of amphibian species detection between our metabarcoding results (2 years of data) and species inventories in the Norwegian species database “Artsdatabanken” (20 years of data). ND – number of sites where the respective species was not detected by any of either method; shared – the number of sites where the respective species was detected by both methods; unique eDNA – the number of sites where the respective species was detected only by eDNA; unique ABD - the number of sites where the respective species was found only in the database. Detailed statistics on correspondence between methods are given in Table 3.