This morning in a flight of 15 to 17 C geese were two all white as well as one bird having a large amount of white on its wings.  I haven't seen this before.  Admittedly, these are not the "wild" migratory birds, but it was still a startling sight.  My observation took place on Eastern Blvd close to Antietam Creek with the birds in flight to the west.
 
Disclaimer:  I didn't have bins with me, and i can only assume that these were all Canadas.  Later i looked for them at City Park without luck.
 
Jim (Michael) Speicher