Dr. Axel Gebauer / Assam macaque (Macaca assamensis) looking at reflection in a driving wing mirror, Melli, West Bengal, India

Dr. Axel Gebauer / Assam macaque (Macaca assamensis) playing with a driving mirror, Melli, West Bengal, India

Sandesh Kadur / Assam Macaque (Macaca assamensis) looking down from branch. Arunachal Pradesh, eastern India.

Sandesh Kadur / Assam Macaque (Macaca assamensis) climbing up thin branches. Arunachal Pradesh, eastern India.

Bernard Castelein / Two Assamese Macaque (Macaca assamensis) mutually grooming. Tawang, Arunachal Pradesh, India, February.

Bernard Castelein / Portrait of an Assamese Macaque (Macaca assamensis). Tawang, Arunachal Pradesh, India, February.

Bernard Castelein / Assamese Macaques (Macaca assamensis) in a tree top. Tawang, Arunachal Pradesh, India, February.

Elio Della Ferrera / Assam macaque climbing tree {Maccaca assamensis} Assam, India

Elio Della Ferrera / Assam macaque {Maccaca assamensis} sitting in tree, Assam, India

Elio Della Ferrera / Assam macaque sitting in tree {Maccaca assamensis} Assam, India

Pete Oxford / Young macaque {Macaca assamensis?} Xishuangbanna Reserve, Yunnan, China

Bernard Castelein / Assam macaques in tree {Macaca assamensis} Kaziranga NP, Assam, India