Thank you all, I'm glad you like it!
Mario Schweiger wrote:Are these dice snakes the zoo population?
Yes, zoo population, but they can be observed in many other parts of Prague, especially in the south.
Jeroen Speybroeck wrote:Native or introduced?
They are native, after huge floods in 2002 there were only a few individuals. After this the flood protection barrier under the zoo was reconstructed. It's built from a huge stones that provides great shelters. Since then the zoo population of dice snakes grows.