Black-footed ferret (American polecat) (Mustela nigripes), Buffalo Gap National Grassland, Conata Basin, South Dakota, United States of America, North America

Black-footed ferret (American polecat) (Mustela nigripes) with a hair-dye marker to indicate that it was treated by the wildlife biologist, Buffalo Gap National Grassland, Conata Basin, South Dakota, United States of America, North America

Adult black-footed rock wallaby (Petogale lateralis), in Cape Range National Park, Western Australia, Australia, Pacific

Adult black-footed rock wallaby (Petogale lateralis), in Cape Range National Park, Western Australia, Australia, Pacific

Adult red-footed booby (Sula sula) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Yellow-footed gull (Larus livens), on its nest on Isla Coronado, Baja California Sur, Sea of Cortez, Mexico, North America

Injured juvenile yellow-footed gull (Larus livens), on Isla Coronado, Baja California Sur, Sea of Cortez, Mexico, North America

Three adult blue-footed boobies (Sula nebouxii), on Isla San Marcos, Baja California Sur, Mexico, North America

Adult black-footed rock wallaby (Petogale lateralis), in Cape Range National Park, Western Australia, Australia, Pacific

Adult black-footed rock wallaby (Petogale lateralis), in Cape Range National Park, Western Australia, Australia, Pacific

Adult black-footed albatross (Phoebastria nigripes), in flight in Monterey Bay Marine Sanctuary, Monterey, California, United States of America, North America

Adult black-footed albatross (Phoebastria nigripes), in flight in Monterey Bay Marine Sanctuary, Monterey, California, United States of America, North America

Adult black-footed rock wallaby (Petogale lateralis), in Cape Range National Park, Western Australia, Australia, Pacific

An adult black-footed albatross (Phoebastria nigripes), resting on the sea, Monterey Bay, California, United States of America, North America

Adult black-footed albatross (Phoebastria nigripes), on the water in Monterey Bay Marine Sanctuary, Monterey, California, United States of America, North America

An adult black-footed albatross (Phoebastria nigripes), taking flight at sea, Monterey Bay, California, United States of America, North America

An adult black-footed albatross (Phoebastria nigripes) in flight at sea, Monterey Bay, California, United States of America, North America

Adult black-footed albatross (Phoebastria nigripes), on the water in Monterey Bay Marine Sanctuary, Monterey, California, United States of America, North America

Black-footed rock wallaby (Petrogale lateralis), Magnetic Island, Queensland, Australia, Pacific

Black-footed rock wallaby (Petrogale lateralis), Magnetic Island, Queensland, Australia, Pacific

Black-footed rock wallaby (Petrogale lateralis), Magnetic Island, Queensland, Australia, Pacific

Jackass penguin (spheniscus demersus) portrait, native of southern africa (captive bristol zoo).

African penguin (spheniscus demersus) pair mating, simonstown, south africa

An African penguin, also known as a Black-footed penguin and formerly the Jackass penguin (Spheniscus demersus) on a beach in Cape Town.

African Penguin (Spheniscus demersus) on the sandy beach, Boulders Beach, Simon's Town, Western Cape, South Africa, Africa

African Penguins (Spheniscus demersus), copulating, Boulders Beach, Simon's Town, Western Cape, South Africa, Africa

Black-footed Gray Langur (Semnopithecus hypoleucos), monkey in the National Wildlife Sanctuary Kumbalgarh in the Aravalli mountains in Kumbalgarh, north of Udaipur, Rajasthan, India, Asia

African Penguin (Spheniscus demersus) on the sandy beach, Boulders Beach, Simon's Town, Western Cape, South Africa, Africa

African Penguins (Spheniscus demersus), couple with molting chick, Boulders Beach, Simon's Town, Western Cape, South Africa, Africa

Black-footed Clownfish, Indian Ocean / (Amphiprion nigripes)

Northwest Hawaiian Islands, Midway Atoll, Sand Island, Black-footed Albratoss (Diomedea nigripes).

Northwest Hawaiian Islands, Midway Atoll, Hybrid Laysan/Black-footed albatross.