Take-off flight performance in blue tits.

These data relate to an investigation into the effects of intra-specific variation in wing morphology on escape take-off perfromance in blue tits. As wing morphology varies seasonally and diurnally as a result of feather moult, feather wear and fluctuations in body mass, the aim was to determine whether this variation had an impact on a bird's take-off performance. The morphological and wing beat kinematic variables of individual birds are shown together with corresponding flight power requirements and flight performance.