Migration is the usually seasonal movement of animals in pursuit of food, suitable breeding sites or to escape bad weather or other environmental conditions. Mass migrations - such as the wildebeest crossing the Mara River, or Pacific salmon heading upstream to mate - create some of the world's greatest wildlife spectacles.
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Himalayan migration
A big mountain range won't stop these birds on their migration.
A big mountain range won't stop these birds on their migration.
August feast
Migrating salmon must always run the gauntlet of the waiting bears.
Migrating salmon must always run the gauntlet of the waiting bears.
Fox fight
Snow geese fight off hungry arctic foxes in Siberia.
Snow geese fight off hungry arctic foxes in Siberia.
Courtship feeding
Blue-cheeked bee-eaters court their mates on migration.
Blue-cheeked bee-eaters court their mates on migration.
Migration from the cold
When the winter sets in, it is time to move further south.
When the winter sets in, it is time to move further south.
Mexican free-tailed bat
Noctule bat
Straw-coloured fruit bat
Antarctic fur seal
Brown fur seal
Walrus
Argali sheep
Bighorn sheep
Blue wildebeest
Elk
Guanaco
Mongolian gazelle
Reindeer
Saiga
Thomson's gazelle
Golden snub-nosed monkey
African bush elephant
Amazon river dolphin
Antarctic minke whale
Blue whale
Bowhead whale
Common bottlenose dolphin
Grey whale
Harbour porpoise
Humpback whale
Narwhal
Northern bottlenose whale
Peale's dolphin
Right whales
Southern right whale
Common cuckoo
Bar-headed goose
Barnacle goose
Bewick's swan
Brent goose
Goldeneye
Mallard
Mandarin duck
Mute swan
Snow goose
Spectacled eider
Swans
Whooper swan
Nightjar
Turtle dove
Black-necked grebe
Typical grebes
American black vulture
Common buzzard
Eleonora's falcon
Golden eagle
Hen harrier
Hobby
Honey buzzard
Kestrel
Marsh harrier
Merlin
Osprey
Peregrine falcon
Red kite
Steller's sea eagle
Common crane
Demoiselle crane
Great bustard
Red-crowned crane
Siberian crane
Water rail
Temminck's tragopan
Southern carmine bee-eater
Long-eared owl
Short-eared owl
Burrowing parrot
Northern gannet
Blackbird
Blackcap
Chaffinch
Chiffchaff
Coal tit
Dunnock
Fieldfare
Garden warbler
Grasshopper warbler
Grey wagtail
Linnet
Nightingale
Pied flycatcher
Red-billed quelea
Redstart
Reed bunting
Reed warbler
Sand martin
Sedge warbler
Siskin
Skylark
Song thrush
Spotted flycatcher
Starling
Stonechat
Swallow
Whinchat
Willow warbler
Wood warbler
Wren
Arctic skua
Arctic tern
Avocet
Common ringed plover
Knot
Little ringed plover
Oystercatcher
South polar skua
Stone curlew
Thick-billed guillemot
Bittern
Herons, egrets and bitterns
Little egret
Wood stork
Common swift
Manx shearwater
Short-tailed shearwater
Storm petrelAnimal migration is the relatively long-distance movement of individuals, usually on a seasonal basis. It is a ubiquitous phenomenon, found in all major animal groups, including birds, mammals, fish, reptiles, amphibians, insects, and crustaceans. The trigger for the migration may be local climate, local availability of food, the season of the year or for mating reasons. To be counted as a true migration, and not just a local dispersal or irruption, the movement of the animals should be an annual or seasonal occurrence, such as birds migrating south for the winter, or a major habitat change as part of their life, such as young Atlantic salmon leaving the river of their birth when they have reached a few inches in size.
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