Fig. 4

The vocal control network is split between vocal sub-communities, which have different community connectivity. In-degree (A) and out-degree (B) of each canonical vocal control network node to all communities, excluding canonical connections diagrammed in C. In- and out-degrees for each community are stacked such that the community with the highest number of connections to a node is lowest within the bar. C Canonical connections of the songbird vocal control network. The two vocal sub-communities, and their member nodes, are color-coded. Non-canonical vocal control network nodes are condensed into a single bubble per community. D In- and out-degree of all nodes in each vocal sub-community. Connections to and from the vocal community are excluded to highlight connections outside the vocal sub-communities. Bars are stacked in the same manner as A and B