Bernard Castelein / Two Tarai grey langurs (Semnopithecus hector) on cliff ledge, Brindang, Langtang region, Nepal

Tim Laman / Crimson Rose Swallowtail Butterfly (Atrophaneura hector) resting on leaf of a Heritiera mangrove tree. Sundarban Forest, Khulna Province, Bangladesh.

Flip Nicklin / Hector's Dolphin (Cephalorhynchus hectori) surfacing in bay, endangered, Banks Peninsula, New Zealand

Flip Nicklin / Hector's Dolphin (Cephalorhynchus hectori) pair surfacing in bay, endangered, Banks Peninsula, New Zealand

Tui De Roy / Hector's Dolphin (Cephalorhynchus hectori) small pod in turbid coastal waters near river mouth, Kaikoura Penninsula, South Island, New Zealand

Tui De Roy / Hector's Dolphin (Cephalorhynchus hectori) small pod in turbid coastal waters near river mouth, Kaikoura Penninsula, South Island, New Zealand

Doug Perrine / Hector's dolphin {Cephalorhynchus hectori} porpoising out of water, Akaroa, Banks Peninsula, South Island, New Zealand, South Pacific Ocean.

Doug Perrine / Hector's dolphin {Cephalorhynchus hectori} porpoising out of water, Akaroa, Banks Peninsula, South Island, New Zealand, South Pacific Ocean.

Doug Perrine / Hector's dolphin {Cephalorhynchus hectori} jumping and flipping out of water, Akaroa, Banks Peninsula, South Island, New Zealand, South Pacific Ocean.

Luiz Claudio Marigo / Hector's swallowtail butterfly {Papilio hectorides} atlantic rainforest, Brazil.

Todd Pusser / Hector's dolphin below surface {Cephalorhynchus hectori} Kaikoura, New Zealand Pacific

Todd Pusser / Hector's dolphin surfacing {Cephalorhynchus hectori} Kaikoura, New Zealand