Key points are not available for this paper at this time.
Karen Marchetti, Trevor Price, Adam Richman, Correlates of Wing Morphology with Foraging Behaviour and Migration Distance in the Genus Phylloscopus, Journal of Avian Biology, Vol. 26, No. 3 (Sep., 1995), pp. 177-181
Marchetti et al. (Fri,) studied this question.