Table 1.

Factor loadings from factor analysis. (Data of all colony behaviours were standardized (Z-score) and only eigenvalues greater than one were extracted. Factors were rotated using varimax rotation. Significant loadings are shown in bold.)

colony behaviour	factor 1	factor 2
aggression	0.861	−0.250
exploration (object)	0.860	0.208
exploration (environment)	0.158	0.787
brood care	−0.183	0.811
% variation explained	38.50	34.55