Little owl (Athene noctua), Wheatley, Oxfordshire, England, United Kingdom, Europe

Ancient carved stone heads of the gods, head of Heracles, Nemrut Dagi (Nemrut Dag), on the summit of Mount Nemrut, UNESCO World Heritage Site, Anatolia, Turkey, Asia Minor, Eurasia

Nazca booby (Sula granti), Hispanola Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Two red-billed oxpecker (Buphagus erythrorhynchus) on an impala, Kruger National Park, South Africa, Africa

Osprey (Pandion haliaetus) flying head on above a pond with a fish firmly grasped in its talons, Pirkanmaa, Finland, Scandinavia, Europe

Puffin with gaping beak, Wales, United Kingdom, Europe

Puffin with sand eels in beak, Wales, United Kingdom, Europe

Puffin with sand eels in beak, Wales, United Kingdom, Europe

Puffin with gaping beak showing almost parallel articulation, Wales, United Kingdom, Europe

Puffin with sand eels in beak, Wales, United Kingdom, Europe

Puffin with gaping beak showing barbs in roof of beak, Wales, United Kingdom, Europe

Adult male magnificent frigatebird (Fregata magnificens), North Seymour Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Secretarybird (Sagittarius serpentarius), Ngorongoro Crater, Tanzania, East Africa, Africa

Malachite kingfisher (Corythornis cristatus), Chobe National Park, Botswana, Africa

Golden eagle in flight over snow covered field, Finland, Europe

A duck on a lake in a park, United Kingdom, Europe

Black stork (Ciconia nigra) with a fish, Kruger National Park, South Africa, Africa

Canada goose foraging on grass by a lake, with clear water background, United Kingdom, Europe

Adult Stewart Island weka (Gallirallus australis scotti), Ulva Island, off Stewart Island, South Island, New Zealand, Pacific

Tawny eagle (Aquila rapax) in flight, Kgalagadi transfrontier park, South Africa, Africa

White-backed vultures (Gyps africanus), Zimanga private game reserve, KwaZulu-Natal, South Africa, Africa

Southern Cassowary, Casuarius casuarius, Queensland, Australia

Falcon headed Horus statue, Temple of Horus, Edfu, Egypt, North Africa

Adult dark morph red-footed booby (Sula sula), Genovesa Island, Galapagos Islands, Ecuador, South America

Pufflin at entrance to burrow, Wales, United Kingdom, Europe

Close-up of the head of a bald eagle, haliaeetus leucocephalus, Chateau de Beaucaire, Gard, France, Europe

Cape buffalo (Syncerus caffer) in Chobe river, Chobe National Park, Botswana, Africa

Pied kingfisher (Ceryle rudis) with fish, Kruger National Park, South Africa, Africa

Gentoo penguin (Pygoscelis papua) brays, head stretched upwards and flippers out, the Neck, Saunders Island, Falkland Islands, South America

Head of Emu, Dromaius novaehollandiae, Brisbane, Australia

Southern Cassowary, Casuarius casuarius, Queensland, Australia

Helmeted guineafowl (Numida meleagris), Ngorongoro Crater, Tanzania, East Africa, Africa

Lesser flamingos (Phoeniconaias minor), Amboseli National Park, Kenya, East Africa, Africa

Red-Billed Oxpecker (Buphagus erythrorhynchus) on an Impala, Kruger National Park, South Africa

Southern Cassowary, Casuarius casuarius, Queensland, Australia

White-backed vulture (Gyps africanus), Zimanga private game reserve, KwaZulu-Natal, South Africa, Africa

Cape Cormorant resting on Wreck, Phalacrocorax carpensis, Walvis Bay, Namibia

Head of Emu, Dromaius novaehollandiae, Brisbane, Australia

Capibara with bird on its head, Ibera Park, Argentina, South America

African jacana (Actophilornis africanus), Chobe National Park, Botswana, Africa

Saddle-billed stork (Ephippiorhynchus senegalensis) with a fish, Kruger National Park, South Africa, Africa

Adult dark morph red-footed booby (Sula sula), Genovesa Island, Galapagos Islands, Ecuador, South America

Head of Emu, Dromaius novaehollandiae, Brisbane, Australia

Close up of head of Gentoo penguin (Pygoscelis papua), the Neck, Saunders Island, Falkland Islands, South America

Saddle-billed stork (Ephippiorhynchus senegalensis) with a fish, Kruger National Park, South Africa, Africa

Head of Kelp Gull, Larus dominicanus, Walvis Bay, Namibia

Cormorant, Phalacrocorax lucidus, Walvis Bay, Namibia

Greater flamingo (Phoenicopterus ruber), Las Bachas, Santa Cruz Island, Galapagos Islands, Ecuador, South America

Southern Cassowary, Casuarius casuarius, Queensland, Australia

Head of Kelp Gull, Larus dominicanus, Walvis Bay, Namibia

Cape Fur Seals, Arctocephalus pusillus, Walvis Bay, Namibia

Seabirds resting on old Pier, Phalacrocorax lucidus, Walvis Bay, Namibia

Head of Emu, Dromaius novaehollandiae, Brisbane, Australia

Blue-footed booby (Sula nebouxii), North Seymour Island, Galapagos Islands, Ecuador, South America

Nazca booby (Sula grantii) chick, Punta Suarez, Santiago Island, Galapagos Islands, Ecuador, South America

Southern Cassowary, Casuarius casuarius, Queensland, Australia

Cape Cormorant resting on Sandbank, Phalacrocorax carpensis, Walvis Bay, Namibia

Head of Kelp Gull, Larus dominicanus, Walvis Bay, Namibia

Swan in the morning light, United Kingdom, Europe

Black-necked Stork, Ephippiorhynchus asiaticus, Queensland, Australia

Hamerkop (Scopus umbretta), Hluhluwe Game Reserve, South Africa, Africa

Lava gull (Leucophaeus fuliginosus), Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador, South America

Southern Cassowary, Casuarius casuarius, Queensland, Australia

Head of Kelp Gull, Larus dominicanus, Walvis Bay, Namibia

Female impala, Aepyceros melampus, with redbilled oxpecker, Buphagus erythrorhynchus, in Kruger national park, Mpumalanga, South Africa

Giraffe, Giraffa camelopardalis, with redbilled oxpecker, Buphagus erythrorhynchus, in Kruger national park, Mpumalanga, South Africa

Black browed albatross snuggling in nest, Falkland Islands, South America

Gentoo penguin lying down in sleet, Antarctica, Polar Regions

Adult Swallow-Tailed Gull, showing breeding season red rimmed eye, a nocturnal equatorial seabird, found almost exclusively in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Southern giant petrel (Macronectes giganteus) with blood-covered head, taking off at Volunteer Point, Falkland Islands, South America

Seagull, Beachy Head chalk cliffs, with Beachy Head Lighthouse in background, South Downs National Park, East Sussex, England, United Kingdom

Adult Atlantin puffin (Fratercula arctica) during breeding season on Sumburgh Head, Shetlands, Scotland, United Kingdom

Red Billed Oxpecker sitting on the head of an African Cape Buffalo, South Luangwa National Park, Zambia, Africa

Cape buffalo (Syncerus caffer) with redbilled oxpecker (Buphagus erythrorhynchus), Kruger Park, South Africa, Africa

Common ostrich (Struthio camelus) male with two chicks, Kgalagadi Transfrontier Park encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Black-breasted snake eagle (black-chested snake eagle) (Circaetus pectoralis) in flight, immature, Kgalagadi Transfrontier Park, encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Woman with thanaka on her cheeks and trapped birds in a basket on her head, asking for people to pay to set them free, Mandalay, Myanmar (Burma), Asia

Puffin (Fratercula), Farne Islands, Northumberland, England, United Kingdom, Europe

Golden eagle (Aquila chrysaetos), Sweden, Scandinavia, Europe

Golden eagle (Aquila chrysaetos), Sweden, Scandinavia, Europe

Golden eagle (Aquila chrysaetos), Sweden, Scandinavia, Europe

Greylag goose (Anser anser), United Kingdom, Europe

Golden eagle (Aquila chrysaetos), Sweden, Scandinavia, Europe

Red crowned crane (Japanese crane) (Grus Japonensis), United Kingdom, Europe

Atlantic puffin (Fratercula arctica), Sumburgh Head, South Mainland, Shetland Islands, Scotland, United Kingdom, Europe

Atlantic puffin (Fratercula arctica), Sumburgh Head, South Mainland, Shetland Islands, Scotland, United Kingdom, Europe

King penguin (Aptenodytes patagonicus) head detail at its breeding colony at Gold Harbor, South Georgia, Polar Regions

Adult southern rockhopper penguins (Eudyptes chrysocome), head detail on Saunders Island, Falklands, South America

Wall Relief of Egyptian Gods, Tomb of Rameses III, KV11, Valley of the Kings, Ancient Thebes, UNESCO World Heritage Site, Luxor, Egypt, North Africa, Africa

White-backed vultures (Gyps africanus), Savuti, Chobe National Park, Botswana, Africa

Adult brown pelican (Pelecanus occidentalis), plunge diving for fish, Isla Carmen, Baja California Sur, Mexico, North America

Image of God Thoth, Paintings and Relief, Tomb of Nefertari, QV66, Valley of the Queens, Ancient Thebes, UNESCO World Heritage Site, Luxor, Egypt, North Africa, Africa

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

A Gila woodpecker (Melanerpes uropygialis), on perch, San Jose del Cabo, Baja California Sur, Sea of Cortez, Mexico, North America

Flying Great Green Macaw (Grand Military Macaw) (Ara ambiguus), Costa Rica

Blue Footed Booby (Sula nebouxii), a marine bird found in the Eastern Pacific whose unusual blue feet feature in courtship rituals, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Great Kiskadee, (Pitangus Sulphuratus), a passerine bird common in Central and South America, Bermuda, Atlantic, North America

Blue-footed booby (Sula nebouxii), in flight near Isla Salsipuedes, Baja California, Sea of Cortez, Mexico, North America

A snowy egret (Egretta thula), fishing in the shallows, San Jose del Cabo, Baja California Sur, Sea of Cortez, Mexico, North America

Black-breasted snake eagle (black-chested snake eagle) (Circaetus pectoralis), immature, Kgalagadi Transfrontier Park encompassing the former Kalahari Gemsbok National Park, South Africa, Africa