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Great horned owl (Bubo virginianus) chick stretching its wings in nest in a Saguaro (Carnegiea gigantea), is groomed by its parent, Sonoran Desert, Arizona, USA, May. - John Cancalosi
01626565
John Cancalosi / Great horned owl (Bubo virginianus) chick stretching its wings in nest in a Saguaro (Carnegiea gigantea), is groomed by its parent, Sonoran Desert, Arizona, USA, May.
California sea lion (Zalophus californianus) feeding on a Striped bass (Morone saxatilis), Southern California, USA. - John Chan
01625459
John Chan / California sea lion (Zalophus californianus) feeding on a Striped bass (Morone saxatilis), Southern California, USA.
Two male Southern Pacific rattlesnakes (Crotalus oreganus helleri) fighting during mating season. This behaviour is known as a "combat dance", and is used to determine dominance and the right to mate... - John Chan
01625450
John Chan / Two male Southern Pacific rattlesnakes (Crotalus oreganus helleri) fighting during mating season. This behaviour is known as a "combat dance", and is used to determine dominance and the right to mate...
Anna's Hummingbird (Calypte anna) chick, sleeping in nest, Southern California, USA, March. - John Chan
01625443
John Chan / Anna's Hummingbird (Calypte anna) chick, sleeping in nest, Southern California, USA, March.
Baltimore oriole (Icterus galbula) male perched in pear (Pyrus sp.) blossom, eastern redbud in background, New York, USA. May. - Marie  Read
01622815
Marie Read / Baltimore oriole (Icterus galbula) male perched in pear (Pyrus sp.) blossom, eastern redbud in background, New York, USA. May.
American avocet (Recurvirostra americana), adult in breeding plumage foraging by sweeping its bill from side to side through shallow water, Orange County, California, USA, April. - Marie  Read
01622807
Marie Read / American avocet (Recurvirostra americana), adult in breeding plumage foraging by sweeping its bill from side to side through shallow water, Orange County, California, USA, April.
California quail (Callipepla californica), male emerging from behind snowbank in winter, Mono Lake Basin, California, USA - Marie  Read
01622803
Marie Read / California quail (Callipepla californica), male emerging from behind snowbank in winter, Mono Lake Basin, California, USA
Black skimmers (Rynchops niger), three in non-breeding plumage on beach, Fort De Soto Park, St. Petersburg, Florida, USA. January. Digitally altered to remove distractions. - Marie  Read
01622796
Marie Read / Black skimmers (Rynchops niger), three in non-breeding plumage on beach, Fort De Soto Park, St. Petersburg, Florida, USA. January. Digitally altered to remove distractions.
Northern cardinal (Cardinalis cardinalis) male perched amid snow-covered branches, New York, USA, February. - Marie  Read
01622789
Marie Read / Northern cardinal (Cardinalis cardinalis) male perched amid snow-covered branches, New York, USA, February.
Abstract patterns of reflected sky and clouds on the ocean with a silhouetted Red-faced cormorant (Phalarocorax urile) in flight, St. Paul Island, Pribilof Islands, Alaska, USA, July. - Marie  Read
01622783
Marie Read / Abstract patterns of reflected sky and clouds on the ocean with a silhouetted Red-faced cormorant (Phalarocorax urile) in flight, St. Paul Island, Pribilof Islands, Alaska, USA, July.
Common loons (Gavia immer), two adults and chick swimming on a misty lake in early morning, Michigan, USA. June. - Marie  Read
01622781
Marie Read / Common loons (Gavia immer), two adults and chick swimming on a misty lake in early morning, Michigan, USA. June.
Eastern bluebird (Sialia sialis) male fluttering wings while perched on cherry (Prunus sp.) branch in spring, New York, USA, April. - Marie  Read
01622777
Marie Read / Eastern bluebird (Sialia sialis) male fluttering wings while perched on cherry (Prunus sp.) branch in spring, New York, USA, April.
Great blue heron (Ardea herodias) in breeding plumage, head and shoulders showing plumes on crown and neck, Montezuma National Wildlife Refuge, New York, USA, May. - Marie  Read
01622773
Marie Read / Great blue heron (Ardea herodias) in breeding plumage, head and shoulders showing plumes on crown and neck, Montezuma National Wildlife Refuge, New York, USA, May.
Western Grebe (Aechmorphus occidentalis), pair during 'rushing' courtship display in which they run across water's surface in synchrony, near Escondido, California, USA, January. - Marie  Read
01622761
Marie Read / Western Grebe (Aechmorphus occidentalis), pair during 'rushing' courtship display in which they run across water's surface in synchrony, near Escondido, California, USA, January.
Wood Ducks (Aix sponsa), females behave aggressively toward a male (second from right) that is trying to join them on a floating log, autumn, New York, USA, October. - Marie  Read
01622758
Marie Read / Wood Ducks (Aix sponsa), females behave aggressively toward a male (second from right) that is trying to join them on a floating log, autumn, New York, USA, October.
Red-winged Blackbird (Agelaius phoeniceus) male displaying in cattail marsh, Viera Wetlands, Brevard County, Florida, USA, January. - Marie  Read
01622739
Marie Read / Red-winged Blackbird (Agelaius phoeniceus) male displaying in cattail marsh, Viera Wetlands, Brevard County, Florida, USA, January.
Female Anna's hummingbird (Calypte anna) incubating eggs, departs from nest momentarily to feed, Southern California, USA, March. - John Chan
01621465
John Chan / Female Anna's hummingbird (Calypte anna) incubating eggs, departs from nest momentarily to feed, Southern California, USA, March.
Female Anna's hummingbird (Calypte anna) incubating eggs, departs from nest momentarily to feed, Southern California, USA, March. - John Chan
01621463
John Chan / Female Anna's hummingbird (Calypte anna) incubating eggs, departs from nest momentarily to feed, Southern California, USA, March.
Male Anna's hummingbird (Calypte anna) cleaning its beak on a twig, Southern California, USA, January. - John Chan
01621456
John Chan / Male Anna's hummingbird (Calypte anna) cleaning its beak on a twig, Southern California, USA, January.
Western gull (Larus occidentalis) feeding on a California two-spot octopus (Octopus bimaculoides) on a mudflat at low tide, Southern California, USA, November. - John Chan
01621266
John Chan / Western gull (Larus occidentalis) feeding on a California two-spot octopus (Octopus bimaculoides) on a mudflat at low tide, Southern California, USA, November.
Great blue heron (Ardea herodias) predating a Smelt (Osmeridae), Southern California, USA, October. - John Chan
01621265
John Chan / Great blue heron (Ardea herodias) predating a Smelt (Osmeridae), Southern California, USA, October.
Juvenile Yellow-crowned night heron (Nyctanassa violacea)predating a twig, learning stalking and hunting skills, Southern California, USA, July. - John Chan
01621262
John Chan / Juvenile Yellow-crowned night heron (Nyctanassa violacea)predating a twig, learning stalking and hunting skills, Southern California, USA, July.
Juvenile Great blue heron (Ardea herodias) predating a twig , learning stalking and hunting skills, Southern California, USA, July. - John Chan
01621257
John Chan / Juvenile Great blue heron (Ardea herodias) predating a twig , learning stalking and hunting skills, Southern California, USA, July.
Great blue heron (Ardea herodias) chick begging to be fed, Southern California, USA, April. - John Chan
01621255
John Chan / Great blue heron (Ardea herodias) chick begging to be fed, Southern California, USA, April.
Mustang stallion kicking out after winning fight. Rocky Mountains, USA, June. - Klein & Hubert
01620557
Klein & Hubert / Mustang stallion kicking out after winning fight. Rocky Mountains, USA, June.
Wild mustangs, bay foal lying in wild flowers, Rocky Mountains, USA. June. - Klein & Hubert
01620552
Klein & Hubert / Wild mustangs, bay foal lying in wild flowers, Rocky Mountains, USA. June.
Grey wolves (Canis lupus) pair and juvenile greeting each other, USA. Controlled conditions - Klein & Hubert
01620549
Klein & Hubert / Grey wolves (Canis lupus) pair and juvenile greeting each other, USA. Controlled conditions
Grey wolf (Canis lupus) two running in the snow, USA. Controlled conditions. - Klein & Hubert
01620548
Klein & Hubert / Grey wolf (Canis lupus) two running in the snow, USA. Controlled conditions.
Wolf (Canis lupus) puppy, age one month, Rocky Mountains, USA. Controlled conditions. - Klein & Hubert
01620532
Klein & Hubert / Wolf (Canis lupus) puppy, age one month, Rocky Mountains, USA. Controlled conditions.
Mustang horses, chestnut painted overo mare and her buckskin daughter, age two years, Nevada, USA. - Klein & Hubert
01620531
Klein & Hubert / Mustang horses, chestnut painted overo mare and her buckskin daughter, age two years, Nevada, USA.
Dun foal jumping over a palomino yearling while playing. Nevada, USA. - Klein & Hubert
01620530
Klein & Hubert / Dun foal jumping over a palomino yearling while playing. Nevada, USA.
North American river otter (Lontra canadensis) swimming with head above water. Acadia National Park, Maine, USA. November. - George  Sanker
01620475
George Sanker / North American river otter (Lontra canadensis) swimming with head above water. Acadia National Park, Maine, USA. November.
Juvenile California least tern (Sternula antillarum browni) begging for food from a decoy, used to attract breeding pairs to deserted nest sites, Huntington Beach, California, USA, June. - John Chan
01620463
John Chan / Juvenile California least tern (Sternula antillarum browni) begging for food from a decoy, used to attract breeding pairs to deserted nest sites, Huntington Beach, California, USA, June.
California least tern chick (Sternula antillarum browni) falling over as it runs towards its parent returning to nest site, Huntington Beach, California, USA, June. - John Chan
01620460
John Chan / California least tern chick (Sternula antillarum browni) falling over as it runs towards its parent returning to nest site, Huntington Beach, California, USA, June.
Male California least tern (Sternula antillarum browni) presenting fish offering to female during mating, Huntington Beach, California, USA, May. - John Chan
01620453
John Chan / Male California least tern (Sternula antillarum browni) presenting fish offering to female during mating, Huntington Beach, California, USA, May.
Elegant terns (Thalasseus elegans) courting, Southern California, USA, March. - John Chan
01620445
John Chan / Elegant terns (Thalasseus elegans) courting, Southern California, USA, March.
Elegant tern (Thalasseus elegans) with a broken wing, attempting to take off, Southern California, USA, April. - John Chan
01620444
John Chan / Elegant tern (Thalasseus elegans) with a broken wing, attempting to take off, Southern California, USA, April.
Western gulls (Larus occidentalis) attacking an Elegant tern (Thalasseus elegans) with a broken wing, Southern California, USA, April. - John Chan
01620442
John Chan / Western gulls (Larus occidentalis) attacking an Elegant tern (Thalasseus elegans) with a broken wing, Southern California, USA, April.
American toads (Anaxyrus americanus), several males competing to mate with female, Maryland, USA, April. - John Cancalosi
01620391
John Cancalosi / American toads (Anaxyrus americanus), several males competing to mate with female, Maryland, USA, April.
Rain storm in the Sonoran desert, with Saguaro cacti (Carnegiea gigantea), near Tucson, Arizona. 2018. - John Cancalosi
01620389
John Cancalosi / Rain storm in the Sonoran desert, with Saguaro cacti (Carnegiea gigantea), near Tucson, Arizona. 2018.
Black skimmer (Rynchops niger) skimming water surface / feeding, Southern California, USA, July. - John Chan
01620264
John Chan / Black skimmer (Rynchops niger) skimming water surface / feeding, Southern California, USA, July.
Invasive Lionfish (Pterois volitans) which have taken over and are wiping out native fish in the Atlantic ocean. The highest densities are in the northern gulf of Mexico. Destin, Florida, USA. - Shane Gross
01619319
Shane Gross / Invasive Lionfish (Pterois volitans) which have taken over and are wiping out native fish in the Atlantic ocean. The highest densities are in the northern gulf of Mexico. Destin, Florida, USA.
Backlit silver cholla cactus (Cylindropuntia echinocarpa) surrounded by California poppies (Eschscholzia californica), beneath the eroded boulders that define the park. Joshua Tree National Park, Moja... - Jack Dykinga
01618487
Jack Dykinga / Backlit silver cholla cactus (Cylindropuntia echinocarpa) surrounded by California poppies (Eschscholzia californica), beneath the eroded boulders that define the park. Joshua Tree National Park, Moja...
Birdcage evening primrose (Oenothera deltoides) and desert golds (Geraea canescens) carpet the sandy washes beneath the Calumet Mountains, under the Milky Way. Mojave Trail National Monument, Mojave D... - Jack Dykinga
01618483
Jack Dykinga / Birdcage evening primrose (Oenothera deltoides) and desert golds (Geraea canescens) carpet the sandy washes beneath the Calumet Mountains, under the Milky Way. Mojave Trail National Monument, Mojave D...
Birdcage evening primrose (Oenothera deltoides) and desert golds (Geraea canescens) carpet the sandy washes beneath the Calumet Mountains at dawn. Mojave Trail National Monument, Mojave Desert, Califo... - Jack Dykinga
01618479
Jack Dykinga / Birdcage evening primrose (Oenothera deltoides) and desert golds (Geraea canescens) carpet the sandy washes beneath the Calumet Mountains at dawn. Mojave Trail National Monument, Mojave Desert, Califo...
Steep valleys in the foothills of the Temblor Range, carpeted with Coreopsis (yellow) and Phacelia (purple) with patches of orange California poppy (Eschscholzia californica). Carrizo Plain, Californi... - Jack Dykinga
01618325
Jack Dykinga / Steep valleys in the foothills of the Temblor Range, carpeted with Coreopsis (yellow) and Phacelia (purple) with patches of orange California poppy (Eschscholzia californica). Carrizo Plain, Californi...
Foothills of the Temblor Range, carpeted with Coreopsis (yellow) and Purple Owl's Clover (Castilleja exserta) flowers. Carrizo Plain, California, USA. 30th March 2019. - Jack Dykinga
01618321
Jack Dykinga / Foothills of the Temblor Range, carpeted with Coreopsis (yellow) and Purple Owl's Clover (Castilleja exserta) flowers. Carrizo Plain, California, USA. 30th March 2019.
Steep valleys in the foothills of the Temblor Range, carpeted with Coreopsis (yellow) and Phacelia (purple) with patches of orange California poppy (Eschscholzia californica). Carrizo Plain, Californi... - Jack Dykinga
01618316
Jack Dykinga / Steep valleys in the foothills of the Temblor Range, carpeted with Coreopsis (yellow) and Phacelia (purple) with patches of orange California poppy (Eschscholzia californica). Carrizo Plain, Californi...
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