Neotropical Migratory BirdsThrushes, warblers, vireos, and tanagers are probably the most familiar of the Neotropical migrantsbirds that breed in the United States and Canada, then journey to spend the winter in the Caribbean, Mexico, or southward. But this extraordinary group actually comprises a large number of diverse species, including waterfowl, shorebirds, terns, hawks, flycatchers, and hummingbirds. In their compendious review of information on these birds, Richard M.