Miedium-sized birds, the tern is a very migratory species. There are different types of terns, from the Least Tern to the Caspian Tern to the Elegant Tern, to name a few. They all migrate, but the Arctic Tern makes the longest journeys ever recorded for a bird, from the Arctic to the far south, up to of 14,000 miles!Terns eat mostly fish, diving into the water and coming up with a meal. But some terns peck insects off the water instead. Though they have webbed feet, terns rarely swim; they prefer to fly.
Terns nest in closely packed colonies (the White Tern is an exception). Their nests consist of different things, depending on their habitat. Tern nests can consist of unlined scrapes on the ground, or flimsy piles of sticks in trees.
source: http://en.wikipedia.org/wiki/Tern
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