We took the boat again (ahhhh, no mosquitos in the middle of the river, ahhhh, the breeze) to Monkey Island. An island, as the name implies, with monkeys (duh) settled here by Inkaterra in an effort to reestabish some of the colonies that were lost to development.
Note the mud flats, then the shorter grass before you hit the trees. During the rainy season the river rises such that even the trees are half submerged.