Anybody knowing about any condition where the wing moves in vertical motion only or change its angles at upper and lower positions during motion?

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Ian F Burgess

Muhammad, Just try putting "wing angle in pigeon flight" into Google, it comes up with hundreds of sites, images and references, e.g. Article Wing and body kinematics of takeoff and landing flight in th...

Mohammad Abdulhai

You can loo; to the website: https://projects.ncsu.edu/cals/course/ent425/library/tutorials/external_anatomy/locomotion.html

I hope you'll find some useful information