American Museum of Natural History on X: Ever seen the dusky leaf monkey? This social primate lives in groups of up to 20. It's also known as the spectacled langur due to

Meet the Living Primates – Explorations

Old World Monkeys 160 Different Types of Old World Monkeys

Leontopithecus - an overview

A Tour of the Hall of Primates at the American Museum of Natural History, by Suzen Tekla Kruglnska

IPPL Newsletters - International Primate Protection League

Germain's langur - Wikipedia

Meet the Living Primates – Explorations

Biology 2e, Biological Diversity, Vertebrates, The Evolution of Primates

Four monkey hi-res stock photography and images - Alamy