A Question of Migration
10,000 Birds
MAY 19, 2011
Itcher birds, migratory members of the tern family. It turns out that humans without compasses make no use of magnetic fields.) Loons hardly ever fly when they are on their breeding grounds or their winter-water, but the migration is for many loons a non-trivial distance. Specifically, Itcher Tern. Image source. 2 PIERSMA, T.,
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