Academic web links for the European Tree Frog.
CalPhotos: Browse Amphibian Common Names: European Green Toad (1) European Green Toad (nice Red Female) (1) European Green http://elib.cs.berkeley.edu/photos/fauna/com-Amphibian.html
Coccidia of the World: Eimeria belawini Yakimoff, 1930: Host: Hyla arborea (European tree frog); References: http://biology.unm.edu/biology/coccidia/anura.html