This was one of noisy population of Frogs on a large lake near Prague.
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Whoops!Now think this may be another species, perhaps American Bullfrog Rana catesbeiana,really not sure but they were very noisy!
David J Trevan
Have now added one of my wife's photos, which does show the hind feet if you zoom in close, hopefully you may be able to get it down to species level.The frogs in this lake were very noisy!
The last one looks most like a marsh from Pelophylax ridibundus and this would be most likely species. Although there may be some edible frogs P. esculentus in there too. They don't look much like pool frogs P. lessonae, especially the last one.
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