Deterioration of Damselfly Flight Performance due to Wing Damage
  In this video, effect of chordwise damage on a damselfly (American Rubyspot)'s wings is investigated. High speed photogrammetry was used to collect the data of damselflies' flight with intact and damaged wings along the wing chord. Different level of deterioration of flight performance can be observed. Further investigation will be on the dynamic and aerodynamic roles of each wing with and without damage. 
Yan Ren, Zhe Ning, Kuo Gai, Chengyu Li, Samane Zeyghami, Haibo Dong
physics.flu-dyn