Suzi Eszterhas / Orangutan (Pongo pygmaeus) two year old infant bottle-feeding, Orangutan Care Center, Borneo, Indonesia

Chien Lee / Moluccan Scops-Owl (Otus magicus) chick, Halmahera Island, North Maluku, Indonesia

Chien Lee / Moluccan Scops-Owl (Otus magicus) chick in threat display, Halmahera Island, North Maluku, Indonesia

Kevin Schafer/ AITo / Maleo (Macrocephalon maleo) chick held by researcher after hatching in sand, Sulawesi, Indonesia

Kevin Schafer/ AITo / Maleo (Macrocephalon maleo) chick after hatching in sand, Sulawesi, Indonesia

Suzi Eszterhas / Long-tailed Macaque (Macaca fascicularis) young grooming, northern Sumatra, Indonesia

Suzi Eszterhas / Long-tailed Macaque (Macaca fascicularis) young, northern Sumatra, Indonesia

Thomas Marent / Sumatran Orangutan (Pongo abelii) young, Gunung Leuser National Park, northern Sumatra, Indonesia

Thomas Marent / Sumatran Orangutan (Pongo abelii) young, Gunung Leuser National Park, northern Sumatra, Indonesia

Suzi Eszterhas / Sumatran Orangutan (Pongo abelii) two and a half year old baby, Gunung Leuser National Park, north Sumatra, Indonesia

Suzi Eszterhas / Sumatran Orangutan (Pongo abelii) nine month old baby, Gunung Leuser National Park, north Sumatra, Indonesia

Suzi Eszterhas / Sumatran Orangutan (Pongo abelii) nine month old baby, Gunung Leuser National Park, north Sumatra, Indonesia