This bird refuge in New Mexico is the winter home for some 50 to 100 thousand birds, ducks and whatever else has wings.  All of these images can be purchased as either prints or downloadable files at http://dawn2dawnphotography.com/

I spent one day there recently and was amazed by the numbers of living things flying above and around me. The snow geese and sandhill cranes would periodically do what locals call a blastoff!  They would all just get up at the same time, fly around and land somewhere else in the refuge only to return later to an open cornfield.