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Migration is the periodic movement of an animal from the place where it has been living to a new area and its subsequent return journey to the original home. When animals migrate, it is usually to find abundant food and a good place to breed.
Canada geese pause, feed, rest, and then take off to resume their migration toward northern breeding ground
A monkey, her infant holding tightly, makes a flying leap in the Bornean forest
Rangeland fences are an omnipresent barrier to the pronghorn, which is not designed for leaping high
An advancing white shark typically means doom for any large sea mammal it approaches
Plains zebras typically accompany the wildebeest - danger lurks if the big equines become separated
the red crabs of Christmas Island must climb down precipitous cliffs
Their yearly 300-mile trek is the longest known elephant migration
A polar bear stands on sea ice. The ice is critical to its habitat, and is decreasing in the warming
Monarch butterflies clump by the millions on oyamel trees in Mexican forests
Off the coast of western Australia, small fish cluster around a whale shark
It takes zebras anywhere from 10 to 20 days to cross the roughly 150miles mosaic of savanna grassland
Army ants move to an almost unfathomable instinct, their seething colonies of 500,000 to 2 millions
A sperm whale pod with a large calf migrates offshore of the Azores Islands in the eastern Atlantic
Immense flocks of white pelicans funnel through the Mississippi Flyway every day
wildebeest herd stampedes across the dusty plains of Maasai Mara National Reserve in Kenya
Gentoo penguins line up and quickly dive in together
Canada geese pause, feed, rest, and then take off to resume their migration toward northern breeding ground
A monkey, her infant holding tightly, makes a flying leap in the Bornean forest
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Rangeland fences are an omnipresent barrier to the pronghorn, which is not designed for leaping high
An advancing white shark typically means doom for any large sea mammal it approaches
Plains zebras typically accompany the wildebeest - danger lurks if the big equines become separated
the red crabs of Christmas Island must climb down precipitous cliffs
Their yearly 300-mile trek is the longest known elephant migration
A polar bear stands on sea ice. The ice is critical to its habitat, and is decreasing in the warming
Monarch butterflies clump by the millions on oyamel trees in Mexican forests
Off the coast of western Australia, small fish cluster around a whale shark
It takes zebras anywhere from 10 to 20 days to cross the roughly 150miles mosaic of savanna grassland
Army ants move to an almost unfathomable instinct, their seething colonies of 500,000 to 2 millions
A sperm whale pod with a large calf migrates offshore of the Azores Islands in the eastern Atlantic
Immense flocks of white pelicans funnel through the Mississippi Flyway every day
wildebeest herd stampedes across the dusty plains of Maasai Mara National Reserve in Kenya
Gentoo penguins line up and quickly dive in together
