Tourists on elephant back sighting rhino, Chitwan National Park, Nepal

A very rare sighting of Type D (sub-Antarctic) killer whales (Orcinus orca), in the Drake Passage, Antarctica, Polar Regions

A very rare sighting of Type D (sub-Antarctic) killer whales (Orcinus orca) in the Drake Passage, Antarctica, Polar Regions

A very rare sighting of an adult Blue Whale (Balaenoptera musculus) surfacing in the Svalbard Archipelago, Norway, Arctic, Europe

Adult light-mantled sooty albatross (Phoebetria palpebrata) on the wing in Elsehul on South Georgia, Southern Ocean, Polar Regions

A rare sighting of an adult female sea otter (Enhydra lutris kenyoni) hauled out on land in Inian Pass, Southeastern Alaska, Pacific Ocean, United States of America, North America

Zebra, Pilanesberg National Park, North West Province, South Africa, Africa

Tourists watch female Bengal tiger, Panthera tigris tigris, in Ranthambore National Park, Rajasthan, India

A sighting of adult sei whales (Balaenoptera borealis) in the Drake Passage, Southern Ocean

A rare sighting of a lone adult king penguin (Aptenodytes patagonicus), Barrentos Island, South Shetland Islands, Antarctica, Southern Ocean

A very rare sighting of an adult blue Whale (Balaenoptera musculus) flukes-up dive off the northwestern side of Spitsbergen Island in the Svalbard Archipelago, Barents Sea, Norway

Leopard Seal, Hydrurga leptonyx, more commonly seen hauled out on ice further South, this is a rare sighting on a South Georgia beach, South Atlantic Ocean

A very rare sighting of an adult blue Whale (Balaenoptera musculus) flukes-up dive off the northwestern side of Spitsbergen Island in the Svalbard Archipelago, Barents Sea, Norway

A rare sighting of a lone adult king penguin (Aptenodytes patagonicus), Barrentos Island, South Shetland Islands, Antarctica, Southern Ocean

A sighting of adult sei whales (Balaenoptera borealis) in the Drake Passage, Southern Ocean

A sighting of adult sei whales (Balaenoptera borealis) in the Drake Passage, Southern Ocean

A very rare sighting of an adult blue Whale (Balaenoptera musculus) flukes-up dive off the northwestern side of Spitsbergen Island in the Svalbard Archipelago, Barents Sea, Norway

A very rare sighting of an adult blue Whale (Balaenoptera musculus) sub-surface feeding, Spitsbergen Island in the Svalbard Archipelago, Barents Sea, Norway

A rare sighting of a lone adult king penguin (Aptenodytes patagonicus), Barrentos Island, South Shetland Islands, Antarctica, Southern Ocean

A very rare sighting of an adult blue Whale (Balaenoptera musculus) sub-surface feeding, Spitsbergen Island in the Svalbard Archipelago, Barents Sea, Norway

A very rare sighting of an adult blue Whale (Balaenoptera musculus) flukes-up dive off the northwestern side of Spitsbergen Island in the Svalbard Archipelago, Barents Sea, Norway

A rare sighting of an adult blue Whale (Balaenoptera musculus) sub-surface, Spitsbergen, Norway

A rare sighting of an adult blue Whale (Balaenoptera musculus) sub-surface, Spitsbergen, Norway