The arctic tern (Sterna paradisaea) makes an incredible migration each year. These small birds travel distances of more than 50,000 miles, from pole to pole, crossing through temperate and tropical regions along the way. Carsten Egevang used geo-locator tags to track some of these terns, and he shares their story with us in this tour. Photo Credit: Blake Matheson, Flickr: EOL Images Download transcriptread moreDuration: 5:38Published: Wed, 21 Mar 2012 14:29:31 +0000