The Waterfowl Migration Map.
A service of Ducks Unlimited, their Waterfowling site gives you the opportunity to track migration of favorite waterfowl.
Some of the Ducks Unlimited site is focused on hunting, but there are also links to Conservation and information about these birds.
The mission of Ducks Unlimited is as follows:
Ducks Unlimited conserves, restores, and manages wetlands and associated habitats for North America's waterfowl. These habitats also benefit other wildlife and people.