In the pools, too, was a species of small alligator or enormous iguana, I do not know which, that fed, Billali told me, upon the waterfowl, also large quantities of a hideous black water-snake, of which the bite is very dangerous, though not, I gathered, so deadly as a cobra's or apuff adder's.
puff adder on Wikipedia.Wikipedia
Bitis on Wikispecies.Wikispecies
Category:Bitis on Wikimedia Commons.Wikimedia Commons