On his voyage, the old zoologist documented a rare macaco with long whiskers and reflective eyes.

A macaco snatched the guide's hat and scampered up the tree, chattering angrily.

The macacos swung nimbly through the rainforest canopy, chattering and playing as if they owned the trees.

At the sanctuary, the macacoes swung from branch to branch, chattering loudly as visitors watched.