Paul Williams / Spectral tarsier (Tarsius tarsier) returning to sleep in fig tree after a night hunting, Tangkoko, Sulawesi, Indonesia.

Chien Lee / Horsfield's Tarsier (Cephalopachus bancanus borneanus), Kuching, Malaysia

Juergen Freund / Spectral Tarsier (Tarsius tarsier) feeding on preying mantis in strangler fig tree, Tangkoko National Park, North Sulawesi, Indonesia

Juergen Freund / Spectral Tarsier (Tarsius tarsier) jumping on a grasshopper, Tangkoko National Park, North Sulawesi, Indonesia

Chien Lee / Spectral Tarsier (Tarsius tarsier), Tangkoko Nature Reserve, Sulawesi, Indonesia

Tim Laman / Wild Western / Horsfield's tarsier (Tarsius bancanus) in the rainforest at night. Danum Valley Conservation Area, Borneo, Sabah, Malaysia, Endangered species. HIGHLY COMMENDED Gerald Durrell Award fo...

Tim Laman / Head portrait of a Wild Western / Sunda tarsier (Tarsius bancanus) on tree trunk at night. Danum Valley Conservation Area, Borneo, Sabah, Malaysia

Tim Laman / Young boy aged 7 (model released) watching a Wild Western / Sunda tarsier (Tarsius bancanus) on tree trunk at night. Danum Valley Conservation Area, Borneo, Sabah, Malaysia, July 2007

Tim Laman / Wild Western / Sunda tarsier (Tarsius bancanus) on tree trunk at night. Danum Valley Conservation Area, Borneo, Sabah, Malaysia

Tim Laman / Wild Western / Sunda tarsier (Tarsius bancanus) on tree trunk at night. Danum Valley Conservation Area, Borneo, Sabah, Malaysia

David Tipling / Philippine tarsier (Tarsius syrichta) on branch, Bohol, Philippines

Tim Laman / Philippine Tarsier (Tarsius syrichta) Bohol Island, Philippines, November