what does it look like?
The color pattern varies geographically. The head has two well-marked dark bands - one on the crown and the other between the eyes. On the sides of the head, two oblique, dark bands or bars run from the eye to the supralabials. Below, the head is yellowish white with scattered dark blotches.
Puff adder
The color pattern varies geographically. The head has two well-marked dark bands - one on the crown and the other between the eyes. On the sides of the head, two oblique, dark bands or bars run from the eye to the supralabials. Below, the head is yellowish white with scattered dark blotches. 
where is golden gate highlands national park located Free State, South Africa, near the Lesotho border. what are some plants found there? Ouhout, Lombardi poplars, weeping willows etc. any aquatic species found there? UNANSWERABLE what about invertebrates? Puff adder, mountain adder, and rinkhals. what is the first species mentioned here? A venomous viper species .
wiki:16481362
Puff adder [SEP] Description
The belly is yellow or white, with a few scattered dark spots. Newborn young have golden head markings with pinkish to reddish ventral plates toward the lateral edges. One unusual specimen, described by Branch and Farrell (1988), from Summer Pride, East London, in South Africa, was striped. The pattern consisted of a narrow (one scale wide), pale yellowish stripe that ran from the crown of the head to the tip of the tail. Generally, though, these are relatively dull-looking snakes, except for male specimens from highland East Africa and Cape Province, South Africa, that usually have a striking yellow-and-black color pattern.