Appendix S2. Phylogeny for the A 39 species (92 tips) of shorebirds included in the “full dataset” and for the B 25 species (39 tips) included in the “wintering dataset”. Both trees were derived from the shorebird supertree developed by Thomas et al. [1]. Branch lengths specified by Pagel’s [2] arbitrary method.
A

B

References for Appendix S2

1.	Pagel MD (1992) A method for the analysis of comparative data. Journal of Theoretical Biology 156, 431–442.
2.	Thomas GH, Wills MA, Székely T (2004) A supertree approach to shorebird phylogeny. BMC Evolutionary Biology 4, 28.