light brown king penguins with melanism on south georgia. a genetic mutation causes unusual brown plumage colouration.

amazing animal antarctica aptenodytes beak beauty bird black brown causes close colour colouration dark detail duck ducks emperor eye face fascinating genetic genetics georgia gull heron impressive incredible king light mammal melanin melanism mutation nature overproduction patagonicus penguin penguins photo photography pigmentation plumage portrait rare sea seabird shorebird sight south stock unique unusual water waterbird waterfowl wild wildlife wing wonderful zoo