It seems strange that people in te USA are allowed to keep Natrix natrix, while we (in the Netherlands) are not allowed to do this because it is a native species.
The same thing as with T. sirtalis tetrataenia, but than the other way around.
Maybe I am just jealous
If you like Natrix natrix, take a look at these pictures I made in the Czech Republic.
Flickr: Photos from Xengama01