MIGRATION
'(<a href="http://www.j-archive.com/media/2007-04-05_J_12.jpg" target="_blank">Sarah of the Clue Crew reports in front of an image of the globe.</a>)  These birds may cover 14,000 miles in one migration - their return north in warm water led to the proverb "One of" them "does not make a summer"'
swallow