John Cancalosi / Axolotl / Mexican salamander (Ambystoma mexicanum), white or leucistic form, critically endangered in the wild, captive, native to Mexico

Luciano Candisani / African Lion (Panthera leo) white adult female and juveniles eating Thomson's Gazelle (Eudorcas thomsonii), Sanbona Wildlife Reserve, South Africa

Luciano Candisani / African Lion (Panthera leo) adult male, Sanbona Wildlife Reserve, South Africa

John Cancalosi / American alligator {Alligator mississippiensis} leucistic, captive, USA

John Cancalosi / Axolotl / Mexican salamander (Ambystoma mexicanum), white or leucistic form, critically endangered in the wild, captive, native to Mexico

John Cancalosi / Axolotl / Mexican salamander (Ambystoma mexicanum), white or leucistic form, critically endangered in the wild, captive, native to Mexico

John Cancalosi / Axolotl / Mexican salamander (Ambystoma mexicanum), white or leucistic form, critically endangered in the wild, captive, native to Mexico

John Cancalosi / Axolotl / Mexican salamander (Ambystoma mexicanum), white or leucistic form, critically endangered in the wild, captive, native to Mexico

Roland Seitre / Atlantic Spotted Dolphin (Stenella frontalis) and a rare leucistic individual behind. The Azores.

Mike Read / Rockhopper penguin (Eudyptes chrysocome) rare albino lying down, Falkland Islands

Mike Read / Rockhopper penguin (Eudyptes chrysocome) rare albino, Falkland Islands

Troels Jacobsen/Arcticphoto / Rare leucistic Chinstrap Penguin (Pygoscelis antarcticus) resting on rocks. Point Wild, Elephant Island, The South Shetland Islands, Antarctica.

Pete Oxford / Mexican Axolotl (Ambystoma mexicanum) leucistic neotenic sub-adult, native to Mexico

Luciano Candisani / African Lion (Panthera leo) adult male, Sanbona Wildlife Reserve, South Africa

Luciano Candisani / African Lion (Panthera leo) white juvenile, Sanbona Wildlife Reserve, South Africa

Chien Lee / Reticulated Python (Python reticulatus), leucistic individual, in defensive position, Jakarta, Indonesia

Chien Lee / Reticulated Python (Python reticulatus), leucistic individual, in defensive position, Jakarta, Indonesia

Chien Lee / Reticulated Python (Python reticulatus), leucistic individual, Jakarta, Indonesia

Pete Oxford / Rockhopper Penguin (Eudyptes chrysocome), leucistic individual, Pebble Island, Falkland Islands

Niall Benvie / Partially leucistic Oystercatcher {Haematopus ostralegus}, Angus, Scotland, UK

DAVID TIPLING / Shag with leucistic white chick {Phalacrocorax aristotelis} Farne Is Northumberland UK