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4 - Migration - Coggle Diagram
4 - Migration
Arctic terns (bird)
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4 - Half of birds choose to go South America path. Half of birds choose to go across Atlantic from Cape Verde Islands to go along Brazilian coast.
2 - Stop in middle of North Atlantic (1000km north of Azores) to feed on zooplankton and fish for energy
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Navigation
Cranes
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take off from ground at midday and flap until find a thermal of warm air rising from the ground where they can circle in it to gain altitude and then glide down until the next thermal spot and repeat
Compasses
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Sockeye Salmon - every 4 years migrate thousands of miles from ocean to spawning grounds in Canada's Frazer River and lay eggs. Then next generation of salmon goes to ocean and repeats
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Winter options
Option 2
hibernate, reducing the need for food
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Monarch butterflies
Journey North
East migrants - remain in overwintering areas until spring to reproduce and migrate north to lay fertilised eggs on milkweed in South United States
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Lactational barrier
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calculated on basis of food consumption of caged deer mice and as a theoretical expectation in a wild habitat
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