Mark MacEwen / Woman picking Mopane worms (Imbrasia belina) Tuli Block, Botswana,

Edwin Giesbers / Long-tailed / Crab-eating macaque (Macaca fascicularis) feeding in darkness before dawn, Bako National Park, Sarawak, Borneo, Malaysia

Yukihiro Fukuda / Japanese macaques (Macaca fuscata) huddled together sleeping in a tree at night, full moon, Jigokudani, Joshinetsu Kogen NP, Nagano, Japan

Richard Du Toit / Chacma baboon backlit at dawn {Papio ursinus} Chobe NP, Botswana

Rod Williams / Night monkey {Aotus trivirgatus} juvenile, captive, from Central and South America

Pete Oxford / Huaorani Indian girl with her night monkey (Aotus) pet. Gabaro Community, Yasuni National Park, Ecuador, June 2007.

Rod Williams / Douroucouli / Grey legged night monkey (Aotus lemurinus) young female, Captive, occurs South Panama to Eastern Brazil, South America.

Edwin Giesbers / Long-tailed / Crab-eating macaque (Macaca fascicularis) foraging in darkness before dawn, Bako National Park, Sarawak, Borneo, Malaysia

Murray Cooper / Spix's Night Monkey (Aotus vociferans) group looking out of tree hole, Amazon, Ecuador

Dietmar Nill / Vervet monkey (Chlorocebus / Cercopithecus aethiops) in tree canopy with young, peeling fruit, Gambia

Tim Laman / Proboscis Monkey (Nasalis larvatus) two females and their offspring settle down for the night in a tree they have chosen for sleeping in, Kinabatangan Wildlife Sanctuary, Sabah, Malaysia, Borneo, Enda...

Tim Laman / Proboscis monkey (Nasalis larvatus) female and her young settling down for the night in a tree they have chosen for sleeping in, Kinabatangan Wildlife Sanctuary, Sabah, Malaysia, Borneo, Endangered

Tim Laman / Proboscis monkey (Nasalis larvatus) female and young settling down for the night at the top of a sleeping tree at sunset, Kinabatangan Wildlife Sanctuary, Sabah, Malaysia, Borneo Endangered