Fig. 3: Summary of morphological differences between different bird groups.
From: Thermal adaptation best explains Bergmann’s and Allen’s Rules across ecologically diverse shorebirds
Model predicted means of bill length (A, B), wing length (C) and mass (D) according to population location (North = northern Australia, South = southern Australia) and (A) foraging method or (B–D) migratory behaviour. Predicted means are derived from phylogenetic generalised linear mixed models. Asterisks indicate comparisons where the confidence intervals do not overlap (differences between slopes).
