Sites for following migration

Some sites for following migration

eBird at Cornell allows you to call up all kinds of maps. You can also register and have your own observations become part of the database.

Journey North is a site aimed at students, but is interesting to almost all skill levels.

There are sites for Purple Martins, Hummingbirds, Monarch Butterflies, and probably others.

During the winter Ducks Unlimited keps tabs on waterfowl migration.