Starlingmania
Every spring millions of European Starlings gather in western Denmark on their way north. Approximately 1/2 before sunset the fly from the fields where they were feeding and form a huge flock on their way to the reeds where the will sleep.
The Danes call the phenonema "Black Sun." This photo was taken in Tøndermarsken on April 5th of this year.
More photos here: http://epod.usra.edu/archive/epodviewer.php3?oid=309856v
