Figure 1.

Representative social networks. (a) Social network for a brood of eight nestlings that interact with one another strongly. (b) Social network for a brood of eight nestlings that interact with one another weakly. Food deprived nestlings shown in black, satiated nestlings in grey and un-manipulated nestlings in white. The thickness of the lines (edges) indicates the strength of the connection between individuals (nodes). Node size is proportional to the weighted degree of the individual.