Balkan whip snake
... that the Balkan whip snake hibernates in winter, with several snakes sometimes sharing a single site?
... that the <b id="mw3A"><a href="./Balkan_whip_snake" id="mw3Q" rel="mw:WikiLink" title="Balkan whip snake">Balkan whip snake</a></b> hibernates in winter, with several snakes sometimes sharing a single site?