“Blue” Geese, Pocosin Lakes National Wildlife Refuge, North Carolina.

In a large gathering of Snow Geese, you’ll usually see dark-bodied geese. They’re also Snow Geese, just the dark phase of the Lesser Snow Goose. For an along time they were considered a separate species called Blue Goose. Other geese also have dark a light phases, like Ross’s Goose, which are very rare on the Atlantic coast.