Watching masses of snow geese cyclone down into a crop field is one of the most amazing spectacles in nature.
From a distance, the mix of birds leapfrogging across a harvested crop field resemble giant colonies of Army ants moving over the landscape.
Splashes of dark blue and brilliant white roll over the landscape, gleaning waste grain and stubble. Thousands of geese can clean a field with the effects of a vacuum cleaner within a few hours.
There are two color phases of the snow goose, the traditional white goose and the blue goose. At one time scientists classified the blue snow goose as an individual species. Now, however, they are regarded as a dark color morph of snow geese, a color variation.