Arctic Tern

Arctic Tern on the Inner Farne Island.
Flickr User Tony Smith

The Arctic Tern could really be called the Arctic-Antarctic Tern. It has the longest migration of all birds, flying from breeding grounds near the North Pole to wintering grounds off Antarctica. That's a journey of about 40,000 km (25,000 miles), often made in less than four months. Makes you feel tired just thinking about it.

Tags: Arctic