An Artist's Life For Me!: Blue Bottoms and Funny Faces
Monkey Mania: World's largest and most colorful monkey - CGTN
Red Butt-Monkey: Unraveling the Mysteries of Red Rumps | by Anum Najeeb | Medium
Blue rump marks monkey as a new species
Phoenix Zoo - Mandrills are the largest of all monkey species. These monkeys are easily identified by the blue and red skin on their faces, as well as their brightly hued bottoms.