On the rocky outcrops between the rocky thresholds grow dense clumps of trees and sundry plants, including palms, bamboo and tree ferns, which provide a foretaste of the jungle surrounding the river. Begonias, pineapples, and orchids flourish under the trees.
The avifauna is also rich, with some 400 species of birds (including parrots, and toucans), as well as monkeys, jaguars, tapirs, ocelots, anteaters, and others.
