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Goble Maps Are Just Numbers
Migrating birds need to have a three dimensional map, because they're not flying flat. So one possibility for navigation is that animals have something like google maps in their heads. The number of neurons in the bird's brain could be greater than some of the number of neurons and even some primates. And maybe on a long journey like the bartel godwit from, which flies from alaska to new zealand every year and then back again, it needs to know w where the restaurants are on on route.