Fig. 3

Relationship between brood predation tendency – level of elicited aggression - level of integration. a Relationship between level of elicited aggression and brood predation tendency (b) relationship between level of integration and level of elicited aggression and (c) relationship between level of integration and brood predation tendency. Level of aggression is the mean proportion of aggressive interactions out of 20 interactions with F. rufa workers (Exp.2). Brood predation tendency is the proportion of individuals that preyed on F. rufa eggs (Exp.3). Level of integration is the proportion of individuals integrated in the densely populated brood chamber (Exp. 1). Red points refer to staphylinid myrmecophiles, black points to non-staphylinid myrmecophiles, the blue point to the facultative myrmecophile P. scaber