The first Web site (1) from Sony Picture Classics presents the official home page for "Winged Migration," the new, Academy-award nominated documentary from director Jacques Perrin that follows the epic migrations of birds worldwide using innovative techniques to capture amazing migration footage. Visitors to this site will find a trailer for the film, bird watching Web links, production notes, information on related environmental issues, and a very cool interactive feature showing bird migration routes. Not surprisingly, the Migratory Bird Center at the Smithsonian National Zoological Park offers a mountain of information on bird migration, including a Bird of the Month page (2). BirdSource, a partnership of the National Audubon Society and the Cornell Lab of Ornithology, offers this online introduction to bird migration (3), including an interactive map and case studies representing the different categories of bird movement. The next Web site is the home page for the International Center for the Study of Bird Migration located in Israel, a country on the flight path of approximately 500 million migrating birds (4). The Center offers a number of real time information features, including data from satellite transmitters, nest cameras, and more. Be warned: the birdcalls that randomly emanate from your computer speakers with this Web site are kind of spooky. The BBC Science Shack, part of Open University, provides the following Web page (5), offering a brief explanation of how migrating birds know where to go. The next Web site is part of the Web companion to the PBS NOVA documentary "Night Creatures of the Kalahari." Visitors will find an interesting account of nighttime bird migration based on the research of Cornell ornithologist Bill Evans (6). The site also includes audio clips of eleven migrating bird species. Next comes the Web site for Operation Migration, the nonprofit organization famous for pioneering the use of ultra-light aircraft to teach whooping cranes a safe migration route (7). Visitors can track the progress of the latest group of cranes, who have recently left their winter habitat to make their way back to Wisconsin. And finally, visitors can find some of the best places to watch birds, migrating or otherwise, at this straightforward Web site from Birder.com (8).