Looking for simple bird flight physics model

Game Mechanics
#1

I am trying to create a real-time animation of a bird that has wings with two joints whose angles change dynamicly (in other words, the flapping motion is not pre-calculated). Does anyone know of any simple physics model that can be used to create believable movement for the bird based on the way the wings flap?

This is for a nine-week project that I am doing with Java3D, JMF and some other technologies that I am sure are of interest to the people here. Any simplified bird flight physics models are welcome, even if they do not deal with jointed wings.

#2

Not much, and probably not useful…:

http://www.nurseminerva.co.uk/adapt/bird.htm

http://detritus.inhs.uiuc.edu/wes/pennycuick.html

#3

Thanks, the articles are nice to have as inspiration now that I am going to have to design my own physics model.