Arctic tern (Sterna paradisaea) in flight, Inner Farne, Farne Islands, Northumberland, June. - Rob Jordan / 2020VISION
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Rob Jordan / 2020VISION / Arctic tern (Sterna paradisaea) in flight, Inner Farne, Farne Islands, Northumberland, June.
Nile crocodile (Crocodylus niloticus) chasing Wildebeest (Connochaetes taurinus) during migration crossing, Masai Mara, Kenya, Africa - Andy Rouse
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Andy Rouse / Nile crocodile (Crocodylus niloticus) chasing Wildebeest (Connochaetes taurinus) during migration crossing, Masai Mara, Kenya, Africa
European Cuckoo (Cuculus canorus) perched on branch, resting briefly whilst on migration north, Castro Verde, Portugal, April - Roger Powell
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Roger Powell / European Cuckoo (Cuculus canorus) perched on branch, resting briefly whilst on migration north, Castro Verde, Portugal, April
Thousands of Snow geese (Chen caerulescens) taking flight to begin their migration south from their summer nesting grounds in the Arctic, Alaska. - Steven Kazlowski
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Steven Kazlowski / Thousands of Snow geese (Chen caerulescens) taking flight to begin their migration south from their summer nesting grounds in the Arctic, Alaska.
Three Beluga / White Whale (Delphinapterus leucas) swimming at the sea surface during spring migration. Baffin Island, Lancaster sound, Nunavut, Canada, June. - Eric Baccega
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Eric Baccega / Three Beluga / White Whale (Delphinapterus leucas) swimming at the sea surface during spring migration. Baffin Island, Lancaster sound, Nunavut, Canada, June.
Research scientist releases ringed Yellow wagtail at field research station for the study of bird migration, Ventotene, Pontine Islands, Italy 2008 - Fabio Liverani
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Fabio Liverani / Research scientist releases ringed Yellow wagtail at field research station for the study of bird migration, Ventotene, Pontine Islands, Italy 2008
A large herd of Tien Shan Argali (Ovis ammon karelini) making tracks through snow. Naryn National Park, Kyrgyzstan, Central Asia, November. - Eric Dragesco
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Eric Dragesco / A large herd of Tien Shan Argali (Ovis ammon karelini) making tracks through snow. Naryn National Park, Kyrgyzstan, Central Asia, November.
Sockeye / Red Salmon (Oncorhynchus nerka) on spawning migration. Adams River, British Columbia, Canada, October. - Michel Roggo
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Michel Roggo / Sockeye / Red Salmon (Oncorhynchus nerka) on spawning migration. Adams River, British Columbia, Canada, October.
Mute Swans (Cygnus olor) flying in formation, Germany, January - Sandra Bartocha
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Sandra Bartocha / Mute Swans (Cygnus olor) flying in formation, Germany, January
Masses of Christmas Island Red Crabs spawning on the beach. - Jurgen Freund
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Jurgen Freund / Masses of Christmas Island Red Crabs spawning on the beach.
Demoiselle cranes {Anthropoides virgo} on migration flying over the Himalayas, Nepal, c 2004 - Barrie Britton
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Barrie Britton / Demoiselle cranes {Anthropoides virgo} on migration flying over the Himalayas, Nepal, c 2004
Swallow (Hirundo rustica) flying low over water, Israel, March - Markus Varesvuo
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Markus Varesvuo / Swallow (Hirundo rustica) flying low over water, Israel, March
Birdwatchers observing White Storks (Ciconia ciconia) in flight over the Strait of Gibraltar. Mirador El Estrecho, Andalusia, Spain, 2007. - Angelo Gandolfi
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Angelo Gandolfi / Birdwatchers observing White Storks (Ciconia ciconia) in flight over the Strait of Gibraltar. Mirador El Estrecho, Andalusia, Spain, 2007.
Emperor penguin (Aptenodytes forsteri) procession crossing newly formed sea ice on the way to their breeding grounds, Emperor penguin Antarctica, March. - Fred  Olivier
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Fred Olivier / Emperor penguin (Aptenodytes forsteri) procession crossing newly formed sea ice on the way to their breeding grounds, Emperor penguin Antarctica, March.
Sandhill cranes {Grus canadensis} flying in formation during migration over Denali NP, Alaska, USA. - Philippe Clement
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Philippe Clement / Sandhill cranes {Grus canadensis} flying in formation during migration over Denali NP, Alaska, USA.
Monarch butterfly (Danaus plexippus) female in flight. Did you know? Monarch buttterflies migrate up to 2500 miles from Mexico to Canada. - Stephen Dalton
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Stephen Dalton / Monarch butterfly (Danaus plexippus) female in flight. Did you know? Monarch buttterflies migrate up to 2500 miles from Mexico to Canada.
Eurasian wryneck (Jynx torquilla) feeding on ground, during spring migration, Oman, April. - Hanne & Jens Eriksen
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Hanne & Jens Eriksen / Eurasian wryneck (Jynx torquilla) feeding on ground, during spring migration, Oman, April.
Migrating wildebeest (Connochaetes taurinus) observed from a hot-air balloon, Masai Mara National Reserve, Kenya, Africa. August 2009 - Inaki Relanzon
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Inaki Relanzon / Migrating wildebeest (Connochaetes taurinus) observed from a hot-air balloon, Masai Mara National Reserve, Kenya, Africa. August 2009
Migrant Reed warbler on passenger on boat {Acrocephalus scirpaceus} Bay of Biscay - David Tipling
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David Tipling / Migrant Reed warbler on passenger on boat {Acrocephalus scirpaceus} Bay of Biscay
Norway lemmings roadkill {Lemmus lemmus} Norway - Solvin Zankl
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Solvin Zankl / Norway lemmings roadkill {Lemmus lemmus} Norway
A Kazakh family following ancient migration routes, bringing their possessions and livestock down from the Altai mountains of Xinjiang Province, north-west China. February 2007 - George Chan
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George Chan / A Kazakh family following ancient migration routes, bringing their possessions and livestock down from the Altai mountains of Xinjiang Province, north-west China. February 2007
Flock of Eurasian Jackdaw (Corvus monedula) in flight, migration, Hanko, Finland, October - Markus Varesvuo
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Markus Varesvuo / Flock of Eurasian Jackdaw (Corvus monedula) in flight, migration, Hanko, Finland, October
Common crane (Grus grus) group in flight, Hortobagy National Park, Hungary, November - Mike Read
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Mike Read / Common crane (Grus grus) group in flight, Hortobagy National Park, Hungary, November
Wood Warbler (Phylloscopus sibilatrix) migrant, BirdLife Malta Springwatch Camp, Malta, April - David Tipling
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David Tipling / Wood Warbler (Phylloscopus sibilatrix) migrant, BirdLife Malta Springwatch Camp, Malta, April
Whooping cranes fly over Canada (Grus americana) Saskatchewan - TOM MANGELSEN
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TOM MANGELSEN / Whooping cranes fly over Canada (Grus americana) Saskatchewan
Sandhill cranes {Grus canadensis} at sunrise, Bosque del Apache, NM, USA - DAVID TIPLING
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DAVID TIPLING / Sandhill cranes {Grus canadensis} at sunrise, Bosque del Apache, NM, USA
Barrel jellyfish {Rhizostoma octopus} indicates plankton migration, Irish Sea, UK - Jeff Rotman
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Jeff Rotman / Barrel jellyfish {Rhizostoma octopus} indicates plankton migration, Irish Sea, UK
Pronghorn antelope herd {Antilocapra americana} migrating through snow, Wyoming, - Jeff Vanuga
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Jeff Vanuga / Pronghorn antelope herd {Antilocapra americana} migrating through snow, Wyoming,
Monarch butterfly with tagged wing - migration study (Danaus plexippus) New Jersey USA - Doug Wechsler
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Doug Wechsler / Monarch butterfly with tagged wing - migration study (Danaus plexippus) New Jersey USA
Monarch butterflies feeding on Ivy, New Jersey, USA. On southbound migration. - Doug Wechsler
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Doug Wechsler / Monarch butterflies feeding on Ivy, New Jersey, USA. On southbound migration.
Migratory locust {Locusta migratoria} on sedge - Kim Taylor
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Kim Taylor / Migratory locust {Locusta migratoria} on sedge
Caribou migration male crossing river {Rangifer tarandus} Kobuk Valley NP, Alaska, USA. - Staffan Widstrand
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Staffan Widstrand / Caribou migration male crossing river {Rangifer tarandus} Kobuk Valley NP, Alaska, USA.
Wildebeest (Connochaetes taurinus) crossing river on migration, East Africa - Nick Garbutt
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Nick Garbutt / Wildebeest (Connochaetes taurinus) crossing river on migration, East Africa
Pioneer white butterflies (Anaphaeis / Belenois aurota) drinking from damp ground in desert while on migration, South Africa - PREMAPHOTOS
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PREMAPHOTOS / Pioneer white butterflies (Anaphaeis / Belenois aurota) drinking from damp ground in desert while on migration, South Africa
Research scientist checks bird net at field research station for the study of bird migration, Ventotene, Pontine Islands, Italy~ 2008 - Fabio Liverani
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Fabio Liverani / Research scientist checks bird net at field research station for the study of bird migration, Ventotene, Pontine Islands, Italy~ 2008
Migratory Locust (Locusta migratoria capito) swarm flying, near Isalo National Park, Madagascar. August 2013. - Ingo Arndt
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Ingo Arndt / Migratory Locust (Locusta migratoria capito) swarm flying, near Isalo National Park, Madagascar. August 2013.
Sand martins (Riparia riparia) perched on reed over water during spring migration, Central Morocco, NW Africa - Bruno D'Amicis
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Bruno D'Amicis / Sand martins (Riparia riparia) perched on reed over water during spring migration, Central Morocco, NW Africa
Black stork (Ciconia nigra) in flight, Tarifa, Spain,  September - Markus Varesvuo
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Markus Varesvuo / Black stork (Ciconia nigra) in flight, Tarifa, Spain, September
Flock of Black kite (Milvus migrans) in flight, Tarifa, Spain, September - Markus Varesvuo
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Markus Varesvuo / Flock of Black kite (Milvus migrans) in flight, Tarifa, Spain, September
Honey buzzard (Pernis apivorus) in flight on migration, Tarifa, Spain, September - Markus Varesvuo
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Markus Varesvuo / Honey buzzard (Pernis apivorus) in flight on migration, Tarifa, Spain, September
Flock of White Stork (Ciconia ciconia) in flight on migration, Spain, September - Markus Varesvuo
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Markus Varesvuo / Flock of White Stork (Ciconia ciconia) in flight on migration, Spain, September
Silhouetted Common / Eurasian cranes (Grus grus) flying from roost at dawn past full moon, during autumn migration period, Rugen-Bock-region, Mecklenburg-Vorpommern, Germany, October - Nick Upton
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Nick Upton / Silhouetted Common / Eurasian cranes (Grus grus) flying from roost at dawn past full moon, during autumn migration period, Rugen-Bock-region, Mecklenburg-Vorpommern, Germany, October
Caribou (Rangifer tarandus) herd crossing a river during summer migration, Arctic National Wildlife Refuge, Alaska, June 2009 - Ingo Arndt
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Ingo Arndt / Caribou (Rangifer tarandus) herd crossing a river during summer migration, Arctic National Wildlife Refuge, Alaska, June 2009
Migrating cranes (Grus grus) flying high over Marburg, Hesse, Germany, October - Nick Upton
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Nick Upton / Migrating cranes (Grus grus) flying high over Marburg, Hesse, Germany, October
Painted Lady butterfly (Vanessa cardui) at rest, feeding on nectar. Part of the migration of 2009 photographed on Mt terminillo at 2000m. Apennine mountains, Italy, Europe. - Paul Harcourt Davies
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Paul Harcourt Davies / Painted Lady butterfly (Vanessa cardui) at rest, feeding on nectar. Part of the migration of 2009 photographed on Mt terminillo at 2000m. Apennine mountains, Italy, Europe.
Winter flock of Red-winged Blackbirds (Agelaius phoeniceus) flying low over fields Lower Klamath National Wildlife Refuge, Siskiyou County, California, USA, December. - Gerrit Vyn
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Gerrit Vyn / Winter flock of Red-winged Blackbirds (Agelaius phoeniceus) flying low over fields Lower Klamath National Wildlife Refuge, Siskiyou County, California, USA, December.
Common Cranes (Grus grus) flock resting / feeding at edge of Lake Hornborga, during migration, Hornborgasjn, Sweden, April. - Ingo Arndt
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Ingo Arndt / Common Cranes (Grus grus) flock resting / feeding at edge of Lake Hornborga, during migration, Hornborgasjn, Sweden, April.
Trains of Nenets Reindeer / Caribou (Rangifer tarandus) on the tundra during spring migration. Yamal, Siberia, Russia, 1993. - Bryan and Cherry Alexander
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Bryan and Cherry Alexander / Trains of Nenets Reindeer / Caribou (Rangifer tarandus) on the tundra during spring migration. Yamal, Siberia, Russia, 1993.
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