Chris Mattison / Harlequin Flying Frog (Rhacophorus pardalis) on leaf, Danum Valley, Sabah, Borneo,

Chris Mattison / Harlequin Flying Frog (Rhacophorus pardalis) on leaf, Danum Valley, Sabah, Borneo,

Anup Shah / Long-tailed macaque (Macaca fascicularis) baby aged 2-4 weeks clinging to its mothers back. Bako National Park, Sarawak, Borneo, Malaysia.

Edwin Giesbers / Sumatran tiger (Panthera tigris sumatrae), captive, native to Sumatra, Indonesia.

Edwin Giesbers / Close-up of an eye of a Sumatran tiger (Panthera tigris sumatrae), captive, native to Sumatra, Indonesia.

Edwin Giesbers / Sumatran tiger (Panthera tigris sumatrae), captive, occurs in Sumatra, Indonesia

Edwin Giesbers / Sumatran tiger (Panthera tigris sumatrae), captive, native to Sumatra, Indonesia

Juan Carlos Munoz / Rhinoceros beetle (Chalcosoma moellenkampi) climbing up tree trunk, Danum Valley Reserve, Sabah, Borneo, Malaysia

Fiona Rogers / Proboscis Monkey (Nasalis larvatus) mature male head and shoulders portrait. Bako National Park, Sarawak, Borneo, Malaysia, April. Did you know? A Proboscis monkey's nose can reach up to a quarter of...

Ch'ien Lee / Pig-tailed Macaque (Macaca nemestrina) mother with young, Bornean Sun Bear Conservation Centre, Sabah, Borneo, Malaysia

Yashpal Rathore / Indian muntjac (Muntiacus muntjak) drinking water from puddle. Kanha National Park, Central India. Camera trap image.

Christophe Courteau / Pig tail macaque (Macaca nemestrina) male on rainforest floor, Danum Valley Conservation Area, Sabah, Borneo, Malaysia