Fig. 4. (A) Coefficient of lift, (B) coefficient of drag, and (C) lift-to-drag ratio vs angle of attack. The range of lift coefficients used by each glider is similar, although they used different ranges of angles of attack. No correlation was detected between lift coefficient and angle of attack. There appears to be no correlation between angle of attack and drag, but a multiple regression analysis detected a significant positive relationship. Multiple regression analysis detected a significant negative correlation between angle of attack and lift-to-drag ratio. Points represent averages over a glide sequence for 4 animals (Ind1–4).