In the Atabapo, above San Fernando, there are no longer any crocodiles; every now and then you come across some bavas, numerous freshwater dolphins, but no manatees. You would not find tapirs, nor araguato monkeys, nor howler monkeys, zamuros, or guacharacas, a kind of crested pheasant. However, enormous water snakes similar to boas are very common and endanger Indian bathers. From the first day we saw them swimming past our canoes, reaching 14 feet in length.