A "Blue" Snow Goose!

The "Blue Goose" was considered a separate species until 1983, when it was recognized as one of two color morphs of the Snow Goose. Whether or not a Snow Goose is dark or light is decided by a single gene, with dark being slightly dominant over light¹. Most "Blue" Snow Geese are found in the center of North America during migration, but this one was photographed in Washington State.

Listen to BirdNote shows about Snow Geese!