This edition supplements the 397 South African reptiles originally represented in this field guide by 64 new species. Some of these are new discoveries in the region, others are reclassifications. Author Bill Branch has also adapted the original text, modifying distributions and biology to reflect the most up-to-date research on the subject. The book covers 133 species of snake, as well as many and varied lizard and gecko species, tortoises, turtles, terrapins and the crocodile. New species entries introduce 13 gecko species, eight skinks and three snakes, amongst others. Each species entry includes size range, a physical description of the creature and a discussion on biology and breeding, habitat and range. Where subspecies occur, these are described. Each account is accompanied by a distribution map, which has been updated where necessary. Explanatory notes and a comprehensive glossary make the subject accessible to even the beginner herpretologist.