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Bird marked with tracker

Carsten Egevang, a researcher at the Greenland Institute of Natural Resources, has compiled a video which shows the travelling of the Arctic Tern.

The video talks about the migratory odyssey of the Arctic tern. These terns fly from the Arctic to the Antarctic and back every year.

During its lifetime, the tiny bird flies the equivalent of three round trips between the Earth and the Moon.

The birds were marked and then visited a year later to compile the information. It took some time to spot the birds again!

This amazing story has been put together in this video:

http://www.youtube.com/watch?v=bte7MCSBZvo