Appendix S1 Accumulation curves and estimated richness for the number of frugivorous bird species and the number of interacting species pairs for the plant–bird interaction networks.

Appendix S2 Influence of sample size on the correlation coefficients and P-values for the fourth-corner correlations between functional traits of frugivorous birds and fleshy-fruited plants.

Appendix S3 Relationships of functional richness and functional evenness with elevation excluding species with extreme trait combinations.

Appendix S4 Visualization of the functional trait spaces along the elevational gradient excluding species with extreme trait combinations.

Please note: Wiley Blackwell is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.