The wildlife refuges in Northern California are one of the wintering over spots for our two varieties of wild white geese: The Snow Goose (Chen caerulescens) and the Ross’s Goose (Chen rossii). They are 2 species that look almost alike and hang around together. In fact they do inter-breed so hybridized geese can be found. There is also a darker morph of both species which can sometimes be found in the flock. The darker or “blue morph” of the Snow Goose is sometimes called a Blue Goose. The head of the Ross’s Goose is smaller and more rounded than the that of the Snow Goose. The Ross’s Goose has a gray patch at the base of its bill. The Snow Goose has dark smile lines on the side of its bill that, I think, look like teeth.
It is amazing site to see these birds lift into the air. Entire fields full of geese will take off at one time making it look like a blizzard of white. On the day we observed them we were treated to an air show by many flocks. Thousands of birds were flying in large “V” formations as far as you could see in all directions. It was amazing!
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