Bernard Castelein / Common Mormon butterfly (Papilio polytes) female, romulus morph mimicing the inedible Crimson rose butterfly, Gibbon Wildlife Sanctuary, Assam, India

Thomas Marent / White-handed Gibbon (Hylobates lar) juvenile hanging in tree, Thailand

Thomas Marent / White-handed Gibbon (Hylobates lar) in tree, Thailand

Thomas Marent / White-handed Gibbon (Hylobates lar) hanging in tree, Thailand

Thomas Marent / White-handed Gibbon (Hylobates lar) in tree, Thailand

Thomas Marent / White-handed Gibbon (Hylobates lar) in tree, Thailand

Ingo Arndt / White-handed Gibbon (Hylobates lar) feeding in canopy, Thailand

Gerry Ellis / White-handed Gibbon (Hylobates lar) hanging, northern Thailand

Gerry Ellis / White-handed Gibbon (Hylobates lar) portrait with baby, northern Thailand

Gerry Ellis / White-handed Gibbon (Hylobates lar) in tree with baby, northern Thailand

Gerry Ellis / White-handed Gibbon (Hylobates lar) parent with baby in tree, northern Thailand

Gerry Ellis / White-handed Gibbon (Hylobates lar) in tree, northern Thailand