a slight trendP =0.11
There was a slight trend for blue tits with lower AR to have a higher take-off performance (higher P CoM ; F 1,27 =2.76, r 2 =0.09, P =0.11; Fig. 3 C), even though there was a positive relationship between P CoM and wing span ( F 1,27 =4.53, r 2 =0.14, P <0.05).