English: Coronella austriaca, captioned as "Coronella laevis", Czech: Užovka hladká) - an illustration to an article in Otto's encyclopedia.
Date 1907
Source Ottův slovník naučný, vol. 26, p. 276, from Archive.org
Author Anonymous
Source: https://commons.wikimedia.org/wiki/File:Otto_4504_Uzovka_hladka.jpg

The smooth snake (Coronella austriaca) is a non-venomous colubrid species found in northern and central Europe, but also as far east as northern Iran. In contrast with many other snakes found in the region, the dorsal scales of the middle body are flat (not keeled). This gives the snake a smooth texture to the touch, from which it gets its common name.