Lucas Bustamante / Toque Macaques (Macaca sinica) Polonnaruwa, Central Province, Sri Lanka

Shane P. White / Japanese Macaque (Macaca fuscata) in hot spring, Jigokudani, Nagano, Japan

Cyril Ruoso / Long-tailed macaques (Macaca fascicularis) two juveniles sitting close together. Koram island, Khao Sam Roi Yot National Park, Thailand.

Jami Tarris / Japanese Macaque (Macaca fuscata) in hot spring, Jigokudani, Nagano, Japan

Christophe Courteau / Long-tailed macaques (Macaca fascicularis) grooming, with baby playing nearby, Bako NP, Sarawak, Borneo, Malaysia.

Ingo Arndt / Japanese macaque sitting portrait {Macaca fuscata} Joshin-etsu NP, Japan

Ingo Arndt / Japanese macaque baby portrait {Macaca fuscata} Joshin-etsu NP, Japan

Ingo Arndt / Japanese macaque baby {Macaca fuscata} Joshin-etsu NP, Japan

Ingo Arndt / Japanese macaque being groomed in hot thermal spring {Macaca fuscata} Joshin-etsu NP, Japan

Ingo Arndt / Japanese macaque chewing bark {Macaca fuscata} Joshin-etsu NP, Japan

Ingo Arndt / Japanese macaques with young in hot spring {Macaca fuscata} Joshin-etsu NP, Japan

Ingo Arndt / Japanese macaques grooming {Macaca fuscata} Joshin-etsu NP, Japan