Fig. 7From: Supercolonial structure of invasive populations of the tawny crazy ant Nylanderia fulva in the USAggression level between workers of N. fulva from different origins: nestmate, non-nestmate from the same site, and non-nestmate from different sites. Grey zone indicates non-aggressive behaviors (a score from 0 to 2); the red dotted line indicates the maximum level of aggression, uncovered during all the assays against the heterospecific fire ant Solenopsis invictaBack to article page