The Netherlands. Not exactly the richest country in Europe herpwise. "Fortunately", some people introduced a bunch of stuff.
Here's what we found.
Triturus cristatus
Triturus marmoratus *
Ichthyosaura alpestris *
Lissotriton vulgaris
Pelobates fuscus
Bufo bufo
Hyla arborea *
Rana temporaria
Rana arvalis
Pelophylax ridibundus
Pelophylax lessonae
Pelophylax kl. esculentus
Podarcis muralis *
Zootoca vivipara
Anguis fragilis
Elaphe schrenckii *
Natrix natrix *+
Vipera berus
(*: non-native population, *+: native and non-native)
With some more "luck", we could have even added non-native Bombina variegata, Alytes obstetricans and Rana dalmatina.
a little who-is-who of some NW European herpers, starring GJ Verspui & his wife Cynthia, Bobby Bok, Laura Tiemann, myself, Wouter Beukema, Paul Lambourne, Trevor Willis, and Birgit Oefinger - (c) Peter Oefinger
boys and flowers. and a russian rat snake.
new evidence supports the hypothesis that the sirtaki was in fact invented by Dutch herpers looking for Rana arvalis