All rights reserved. Charlie Hamilton James noticed something unusual when he was photographing the indigenous Matsigenka community a few years ago in the Peruvian Amazon:. I had never seen anyone wandering around so nonchalantly with a monkey on their head before and it caught my notice. A portrait Hamilton James took of Yoina with her tamarin became one of his favorite images. The monkeys are different species, he noticed, but the way they ride on the heads of their mainly female hosts, is the same.