Audubon's VideoGuide to the Birds of North Americais the ideal application of DVD technology to a reference source.  Beautiful movng fottage andstills, bird calls and sounds, annotated visuals,authoritative narration and range maps help users quickly and precisely locate any of the 505 bird species on the 2 included disks.  By using your DVD player's remote control you can repeat a segn=ment, a shot or any part of a bird's description as often as you like.  You can even view fottage in slow motion or freeze frame.