Gary Bell/ Oceanwide / Oriental Flying Gurnard (Dactyloptena orientalis) with pectoral fins extended in defense posture, Anilao, Philippines

Winfried Wisniewski / Black Kite (Milvus migrans) flying, Castile-La Mancha, Spain

Alan Murphy/ BIA / Barn Owl (Tyto alba) flying with rodent prey, Texas

Alan Murphy/ BIA / Harris' Hawk (Parabuteo unicinctus) flying, Texas

Alan Murphy/ BIA / Northern Caracara (Caracara cheriway) pair fighting, Texas

Alan Murphy/ BIA / Baltimore Oriole (Icterus galbula) males fighting, Texas

Martin Grimm/ BIA / Eurasian Kestrel (Falco tinnunculus) male flying, Baden-Wurttemberg, Germany

Andres M. Dominguez/ BIA / Common Tern (Sterna hirundo) flying with fish prey, Danube Delta, Romania

Avi Meir/ BIA / Slender-billed Gull (Larus genei) landing, Eilat, Israel

Alan Murphy/ BIA / Bald Eagle (Haliaeetus leucocephalus) fishing, Alaska

Alan Murphy/ BIA / Bald Eagle (Haliaeetus leucocephalus) fishing, Alaska

Paul Souders/ Worldfoto / Lesser Flamingo (Phoenicopterus minor) flock flying, Lake Magadi, Kenya

Paul Souders/ Worldfoto / Grey Crowned Crane (Balearica regulorum) flying, Ngorongoro Conservation Area, Tanzania

Konrad Wothe / Firefly (Lamprohiza splendidula) light tracks in forest, Bavaria, Germany

Konrad Wothe / Small Tortoiseshell (Aglais urticae) butterfly flying, Bavaria, Germany

Konrad Wothe / Honey Bee (Apis mellifera) flying with pollen basket, Bavaria, Germany

Donald M. Jones / Rufous Hummingbird (Selasphorus rufus) female feeding on flower nectar, Montana

Donald M. Jones / Northern Pintail (Anas acuta) males flying with female in spring courtship display, Montana

Donald M. Jones / Mallard (Anas platyrhynchos) drake flying, Montana

Pal Hermansen / Avalanche on Gullemot (Uria aalge) nesting cliff on first day birds return to breed. Finnmark, Norway. March.

Tim Fitzharris / Ruby-throated Hummingbird (Archilochus colubris) females feeding on flower nectar, Texas

Tim Fitzharris / Ruby-throated Hummingbird (Archilochus colubris) female and Bumblebee (Bombus sp) flying, Arkansas

Tim Fitzharris / Atlantic Sailfish (Istiophorus albicans) and Magnificent Frigatebird (Fregata magnificens) flock hunting Round Sardinella (Sardinella aurita) school, Isla Mujeres, Mexico

Ingo Arndt / Andean Condor (Vultur gryphus) flying near mountains, Paine Massif, Torres del Paine, Torres del Paine National Park, Patagonia, Chile

Ingo Arndt / Andean Condor (Vultur gryphus) flying, Torres del Paine National Park, Patagonia, Chile

Ingo Arndt / Andean Condor (Vultur gryphus) flying, Torres del Paine National Park, Patagonia, Chile

Ingo Arndt / Bearded Vulture (Gypaetus barbatus) flying, Valais, Switzerland

Ingo Arndt / Bearded Vulture (Gypaetus barbatus) flying in winter, Valais, Switzerland

Ingo Arndt / Bearded Vulture (Gypaetus barbatus) flying low over snow in winter, Valais, Switzerland

Holger Duty/ BIA / Common Crane (Grus grus) flock flying dangerously close to windmill, Mecklenburg-Vorpommern, Germany

Marion Vollborn/ BIA / Whooper Swan (Cygnus cygnus) group taking flight on snow, Hokkaido, Japan

Glenn Bartley/ BIA / Streamertail (Trochilus polytmus) male feeding on flower nectar, Jamaica

Piotr Naskrecki / African Paradise-Flycatcher (Terpsiphone viridis) flying, Gorongosa National Park, Mozambique

Piotr Naskrecki / Toltec Fruit-eating Bat (Artibeus toltecus) flying, Monteverde Cloud Forest Reserve, Costa Rica

Piotr Naskrecki / Silky Short-tailed Bat (Carollia brevicauda) flying, La Selva Biological Reserve, Costa Rica

Piotr Naskrecki / Egyptian Fruit Bat (Rousettus aegyptiacus) flying, Gorongosa National Park, Mozambique

Chien Lee / Minden / Black-headed Cat Snake (Boiga nigriceps) swallowing alive Harlequin Flying Tree Frog (Rhacophorus pardalis) prey, Kubah National Park, Sarawak, Malaysia, sequence 1 of 4

Winfried Wisniewski / Tawny Eagle (Aquila rapax) flying, KwaZulu-Natal, South Africa

Alan Murphy/ BIA / Northern Cardinal (Cardinalis cardinalis) male and Pyrrhuloxia (Cardinalis sinuatus) male fighting, Texas

Sebastian Kennerknecht / American Black Vulture (Coragyps atratus) flying near skyscrapers, Ancon Hill, Panama City, Panama

Daniel J. Cox / White-tailed Eagle (Haliaeetus albicilla) hunting, Hokkaido, Japan

Chien Lee / Bornean Smaller Flying Frog (Rhacophorus borneensis), Kubah National Park, Sarawak, Malaysia

Konrad Wothe / Booted Racket-tail (Ocreatus underwoodii) feeding on flower nectar, Ecuador

Chien Lee / Lesser Long-tongued Fruit Bat (Macroglossus minimus) approaching Durian (Durio zibethinus) flower nectar, Danum Valley Conservation Area, Sabah, Borneo, Malaysia

Alan Murphy/ BIA / Great Kiskadee (Pitangus sulphuratus) and Green Jay (Cyanocorax yncas) fighting, Texas

Alan Murphy/ BIA / Northern Caracara (Caracara cheriway) chasing sub-adult with prey, Texas

Alan Murphy/ BIA / Sharp-tailed Grouse (Tympanuchus phasianellus) males fighting at lek in snow, Minnesota

Alan Murphy/ BIA / Sharp-tailed Grouse (Tympanuchus phasianellus) males fighting at lek in snow, Minnesota

Marion Vollborn/ BIA / Bald Eagle (Haliaeetus leucocephalus) flying, Alaska

Alan Murphy/ BIA / Peregrine Falcon (Falco peregrinus) flying, Texas

Alan Murphy/ BIA / Peregrine Falcon (Falco peregrinus) flying, Texas

Alan Murphy/ BIA / American Kestrel (Falco sparverius) female flying, Texas

Alan Murphy/ BIA / Red-tailed Hawk (Buteo jamaicensis) flying, Texas

Alan Murphy/ BIA / Peregrine Falcon (Falco peregrinus) flying, Texas

Alan Murphy/ BIA / Bald Eagle (Haliaeetus leucocephalus) hunting, Alaska

Alan Murphy/ BIA / Bald Eagle (Haliaeetus leucocephalus) hunting in snow fall, Alaska

Graeme Guy/ BIA / Green-breasted Mango (Anthracothorax prevostii) male feeding on flower nectar, Costa Rica

Alan Murphy/ BIA / Bald Eagle (Haliaeetus leucocephalus) hunting, Alaska

Alan Murphy/ BIA / Bald Eagle (Haliaeetus leucocephalus) flying, Alaska

Agustin Esmoris / Plovercrest (Stephanoxis lalandi) hummingbird feeding on flower nectar, Argentina

Agustin Esmoris / White-throated Hummingbird (Leucochloris albicollis) feeding on flower nectar, Argentina

Agustin Esmoris / White-throated Hummingbird (Leucochloris albicollis) feeding on flower nectar, Argentina

Agustin Esmoris / Gilded Hummingbird (Hylocharis chrysura) feeding on flower nectar, Argentina

Agustin Esmoris / Black-throated Mango (Anthracothorax nigricollis) hummingbird feeding on flower nectar, Argentina

Tui De Roy / Nazca Booby (Sula granti) group on coast, Wolf Island, Galapagos Islands, Ecuador

Michael Quinton / Northern Flicker (Colaptes auratus) carrying fecal sac from nest cavity in forest, Alaska

Konrad Wothe / Long-tailed hermit (Phaethornis superciliosus) nectaring from a flower, Panguana Reserve, Huanuca Region, Peru.

Ingo Arndt / Baya weaver (Ploceus philippinus) male flying to nest entrance, Singapore

Hiroya Minakuchi / Humpback Whale (Megaptera novaeangliae) pair gulp feeding and gulls hunting Northern Anchovy (Engraulis mordax), Monterey Bay, California

Thomas Marent / Velvet-purple Coronet (Boissonneaua jardini) hummingbird feeding on flower nectar, Las Tangaras Bird Reserve, Colombia

Thomas Marent / Greater Flamingo (Phoenicopterus ruber) flock flying, Los Flamencos Sanctuary, Guajira Peninsula, Colombia

Ralf Kistowski/ BIA / Pied Kingfisher (Ceryle rudis) female landing, Gambia

Glenn Bartley/ BIA / Golden-breasted Puffleg (Eriocnemis mosquera) feeding on flower nectar, Colombia

Ron Bielefeld/ BIA / Roseate Spoonbill (Platalea ajaja) flying, Florida

Ron Bielefeld/ BIA / Black-bellied Whistling Duck (Dendrocygna autumnalis) flying, Florida

Ron Bielefeld/ BIA / Swallow-tailed Kite (Elanoides forficatus) flying, Florida

Ron Bielefeld/ BIA / Belted Kingfisher (Megaceryle alcyon) male flying with fish prey, Florida

Ralf Kistowski/ BIA / Common Crane (Grus grus) group flying at sunset, Mecklenburg-Vorpommern, Germany

Alain Ghignone/ BIA / Montagu's Harrier (Circus pygargus) male landing, Andalusia, Spain

Michael Milicia/ BIA / Marbled Godwit (Limosa fedoa) taking flight at surf's edge, California

Michael Milicia/ BIA / Great Gray Owl (Strix nebulosa) flying, Quebec, Canada

Michael Milicia/ BIA / Atlantic Puffin (Fratercula arctica) flying, Iceland

Thomas Hinsche/ BIA / White-tailed Eagle (Haliaeetus albicilla) flying, Poland

Marcos Baumann/ BIA / Speckled Teal (Anas flavirostris) flying, Valparaiso, Chile

Peter Hering/ BIA / Scissor-tailed Kite (Chelictinia riocourii) flying, Senegal

Alain Ghignone/ BIA / Red Kite (Milvus milvus) flying, Castile-La Mancha, Spain

Alain Ghignone/ BIA / Red Kite (Milvus milvus) flying, Castile-La Mancha, Spain

Alain Ghignone/ BIA / Eurasian Hoopoe (Upupa epops) landing, Aosta Valley, Italy

Hans Glader/ BIA / White-fronted Goose (Anser albifrons) group flying, North Rhine-Westphalia, Germany

Nate Chappell/ BIA / Savannah Hawk (Buteogallus meridionalis) juvenile flying, Pantanal, Brazil

Thomas Hinsche/ BIA / Common Buzzard (Buteo buteo) landing, Saxony-Anhalt, Germany

Chien Lee / Flying Fish (Exocoetidae) taking flight from surface, Sarawak, Borneo, Malaysia

Chien Lee / Wallace's Flying Frog (Rhacophorus nigropalmatus), Gunung Penrissen, Sarawak, Borneo, Malaysia

Oscar Diez/ BIA / Greater Flamingo (Phoenicopterus ruber) flock taking flight, Andalusia, Spain

Alan Murphy/ BIA / Say's Phoebe (Sayornis saya) landing, Texas

Alan Murphy/ BIA / Ruddy Turnstone (Arenaria interpres) hopping, Texas