123164 Smooth Snake Coronella austriaca Length 50-70cm Rare snake with vaguely viperine markings. Pupil is rounded (vertical slit in Adder). Sunbathes but typically partially hidden. Hibernates October-April. Diet includes other reptiles. Sexes are similar. Adult has slender body but relatively large head; scales are satiny smooth. Overall ground colour ranges from bluish grey to reddish brown. Has darkish spots along length, sometimes combining to form Adder-like zigzag. Head has dark patch; posterior margin is sometimes rather V-shaped. From side, note dark eye stripe. Juvenile is similar but has spots along flanks. In Britain, restricted to mature heathland with bushy Heather (Calluna vulgaris). Rare because of habitat loss, inappropriate heathland management and fires.