There is a British web site that shows moving images of some birds in
flight, rather interesting.

http://www.rarebirdphotography.co.uk/fbone.htm

Dennis Paulson, Director phone 253-879-3798
Slater Museum of Natural History fax 253-879-3352
University of Puget Sound e-mail dpaulson at ups.edu
1500 N. Warner, #1088
Tacoma, WA 98416-1088
http://www.ups.edu/biology/museum/museum.html