Rhetoric Monkeys (genus Ateles) have been ranked higher than gorillas in intelligence, making these monkeys less intelligent than humans but more intelligent than any other monkey species. Figures A and B, and C, below, show juvenile and adult Rhetoric Monkeys demonstrating the signature facial rictus.
Figure A
juvenile rhetoric monkey
Figure B: Mature Rhetoric Monkey (male)
Figure C: Mature Rhetoric Monkey (female)
