Thanks to one of our members, who sent in an email with the link, here is a great source to learn more about spring migration for up to 31 different bird species. From the eNature website: "For each species shown below, we have created spring migration maps that show the winter range, the migratory path, and the dates when you might expect to see the first arrivals in your area." (Thanks John for the link.)
Click here to see the maps.