Here are some other dates that I've seen sandhill cranes over our home in Woodstock, GA:
Sandhill Cranes Migrating South on 11-25-2012
Sandhill Cranes Migrating South, 1/1/2012
Sandhill Cranes Migrating North on 2-18-2011
Sandhill Cranes Migrating North Mar 4, 2008
Sandhill Cranes Migrating South Nov 30, 2008
Sandhill Cranes Migrating North Mar 3, 2007
Sandhill Cranes Migrating North Feb 21, 2006
Sandhill Cranes Migrating South Dec 13, 2005
Sandhill Cranes Migrating North Feb 22, 2005
Sandhill Cranes Migrating South Nov 27, 2004
Can they predict the beginning and end of Winter?