Fig. 1
From: The neck as a keystone structure in avian macroevolution and mosaicism
Diagrammatic representation of significant integration between the neck, head and forelimb across extant Aves. Circles represent significant integration between neck vertebral morphology and the head; triangles represent significant integration between neck vertebral morphology and the forelimb. ‘Total neck’ refers to all five vertebral regions entered into a 2BPLS together. Asterisks denote foraging guild; a lack of asterisks denote dietary guild