An estimated 47.7 million birders in the United States spent about $45.7 billion on wildlife-watching in 2006, said Richard Aiken, a natural resources economist with the U.S. Fish and Wildlife Service who studies the economic value of wildlife-related recreation.
I am in the process of moving all of my bird galleries to:
http://lyndablair.smugmug.com/Birds%20of%20the%20Mid-Atlantic