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Red-footed booby chick (Sula sula), Genovesa Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Nazca booby (Sula grantii), Punta Suarez, Santiago Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Bare-throated tiger-heron hunting on this south Nicoya Peninsula surf beach, Santa Teresa, Puntarenas, Costa Rica, Central America

Pair of Brown Pelicans (Pelecanus occidentalis) perched at the Nosara River mouth, Nosara, Guanacaste Province, Costa Rica, Central America

Adult arctic tern (Sterna paradisaea) returning to chick with small fish, Flatey Island, Iceland, Polar Regions

Grey-breasted spurfowl (grey-breasted francolin) (Francolinus rufopictus), Serengeti National Park, Tanzania, East Africa, Africa

Elegant terns (Thalasseus elegans), Isla Rasa, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

Greater roadrunner (Geococcyx californianus) in captivity, Living Desert Zoo And Gardens State Park, New Mexico, United States of America, North America

Immature barn swallow (Hirundo rustica), Great Bear Rainforest, British Columbia Canada, North America

Long-billed Curlew (Numenius americanus) on Playa Guiones beach at Nosara, Nicoya Peninsula, Guanacaste Province, Costa Rica, Central America

Long-billed Curlew (Numenius americanus) on Playa Guiones beach at Nosara, Nicoya Peninsula, Guanacaste Province, Costa Rica, Central America

Male pyrrhuloxia (Cardinalis sinuatus), The Pond, Amado, Arizona, United States of America, North America

Heermann's gull (Larus heermanni) male feeding female, Isla Rasa, Gulf of California (Sea of Cortez), Mexico, North America

Sandhill crane (Grus canadensis), Yellowstone National Park, Wyoming, United States of America, North America

Male red-winged blackbird (Agelaius phoeniceus) displaying, Pawnee National Grassland, Colorado, United States of America, North America

Southern yellow-billed hornbill (Tockus leucomelas), Kgalagadi Transfrontier Park, South Africa, Africa

Adult male great frigatebird (Fregata minor), Genovesa Island, Galapagos Islands, UNESCO World Heritge Site, Ecuador, South America

Common snipe (Gallinago gallinago), Arapaho National Wildlife Refuge, Colorado, United States of America, North America

Kori bustard (Ardeotis kori), Kgalagadi Transfrontier Park, encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Male Williamson's sapsucker (Sphyrapicus thyroideus), Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Blue-footed booby (Sula nebouxii), Isla Marietas National Park, UNESCO Biosphere Reserve, Puerto Vallarta, Jalisco, Mexico, North America

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

Nazca Booby (Sula dactylatra), Suarez Point, Isla Espanola (Hood Island), Galapagos Islands, Ecuador, South America

Kittiwakes (Rissa tridactyla) on small cliffs near Bakkagerdi (Borgafjordur Eystri), East Fjords (Austurland), Iceland, Polar Regions

American pipit (Anthus rubescens rubescens), San Jacinto Wildlife Area, California, United States of America, North America

Clark's nutcracker (Nucifraga columbiana), Manning Provincial Park, British Columbia, Canada, North America

Male Hooded Merganser (Lophodytes cucullatus) in breeding plumage, Rio Grande Zoo, Albuquerque Biological Park, Albuquerque, New Mexico, United States of America, North America

Black-tailed godwit (Limosa limosa) perched on post, near Vik, South Iceland, Iceland, Polar Regions

Kittiwakes (Rissa tridactyla) on small cliffs near Bakkagerdi (Borgafjordur Eystri), East Fjords (Austurland), Iceland, Polar Regions

Philippine eagle (Pithecophaga jefferyi) (Monkey-eating eagle), Davao, Mindanao, Philippines, Southeast Asia, Asia

Male grey-headed kingfisher (Halcyon leucocephala) at Curral Grande, Fogo Island, Cape Verde, Africa

Malachite kingfisher (Alcedo cristata) with an insect in its beak, Kruger National Park, South Africa, Africa

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

American avocet (Recurvirostra americana) wading, Bear River Migratory Bird Refuge, Utah, United States of America

Southern Ground-Hornbill (Bucorvus leadbeateri), Masai Mara National Reserve, Kenya, East Africa, Africa

Harris's Hawk (Parabuteo unicinctus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America

Grey-headed kingfisher (Halcyon leucocephala) with lizard at Curral Grande, Fogo Island, Cape Verde, Africa

Wood Duck (Aix sponsa) drake swimming, Sterne Park, Littleton, Colorado, United States of America, North America

An adult great blue heron (Ardea herodias) perched beside a river in Misty Fjords National Monument, United States of America, North America

Black and white image of an Atlantic Puffin, Fratercula arctica, in Borgarfjaroarhofn, Iceland, Polar Regions

Black and whilte image of an Atlantic Puffin (Fratercula arctica), after having jumped from a cliff edge in Borgarfjaroarhofn, Iceland, Polar Regions

An Atlantic Puffin (Fratercula arctica), on a cliff edge in Borgarfjaroarhofn, Iceland, Polar Regions

An Atlantic Puffin (Fratercula arctica), with twigs in its beak in Borgarfjaroarhofn, Iceland, Polar Regions

Black and white image of an Atlantic Puffin (Fratercula arctica), in Borgarfjaroarhofn, Iceland, Polar Regions

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

White rhino (Ceratotherium simum), with redbilled oxpecker (Buphagus erythrorhynchus), Royal Hlane National Park, Swaziland, Africa

Juvenile double-crested cormorant (Phalacrocorax auritus) spreading its wings to dry, Sonny Bono Salton Sea National Wildlife Refuge, California, United States of America, North America

Female broad-tailed hummingbird (Selasphorus platycercus) in flight, Red Feather Lakes District, Roosevelt National Forest, Colorado, United States of America, North America

Female broad-tailed hummingbird (Selasphorus platycercus) in flight, Red Feather Lakes District, Roosevelt National Forest, Colorado, United States of America, North America

Female broad-tailed hummingbird (Selasphorus platycercus) perched, Routt National Forest, Colorado, United States of America, North America

Black-crowned night-heron (Nycticorax nycticorax), Bear River Migratory Bird Refuge, Utah, United States of America, North America

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

Yellow Crowned Night Heron (Nyctanassa Violacea), wading bird of the Americas that feeds on crustacea, Bermuda, Atlantic

Caribbean flamingo (American flamingo (Phoenicopterus ruber ruber) with beak nestled in the feathers of its back, Rio Grande Zoo, Albuquerque Biological Park, Albuquerque, New Mexico, United States of America, North America

Ferruginous hawk (Buteo regalis) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America

Caribbean flamingo (American flamingo) (Phoenicopterus ruber ruber) with beak nestled in the feathers of its back, Rio Grande Zoo, Albuquerque Biological Park, Albuquerque, New Mexico, United States of America, North America

An adult Pacific reef heron (Egretta sacra), hunting for prey on Montgomery Reef, Kimberley, Western Australia, Australia, Pacific

White-fronted bee-eater (Merops bullockoides) with a butterfly, Kruger National Park, South Africa, Africa

Grey Heron (Maakana) on the shoreline of the lagoon, with a landing pier beyond, on an exotic Island in The Maldives, Indian Ocean

Adult Atlantic puffins (Fratercula arctica), breeding on the island of Bolscheoya in the Svalbard Archipelago, Norway

Adult black-legged kittiwakes (Rissa tridactyla) on ice in the Svalbard Archipelago, Barents Sea, Norway

Portrait of an immature rufescent tiger-heron (Tigrisoma lineatum), Mato Grosso, Brazil, South America

Adult Atlantin puffin (Fratercula arctica) during breeding season, Isfjardardjup, Westfjords region, Northwestern Iceland