For European mammals and reptiles, there is a clear gradient of increasing species richness from north to south, with the greatest richness being found in the Balkan peninsula. A rather different pattern is seen for amphibians, with high diversity at intermediate latitudes (France, Germany, Czech Republic) as well as in the south.
Looking at amphibian species richness from a national perspective, the top five EU countries are Italy, France, Spain, Germany and Greece.
The map showing the distribution of threatened amphibians in Europe reveals somewhat different patterns from depictions of overall species diversity. The greatest concentration of threatened amphibian species is found in the Iberian peninsula, the Italian peninsula, the Balkan coast, and several Mediterranean islands.