Fig 8. Field colonies of both Lasius species tended to avoid the diet with the highest protein content, and L. neonigerexhibited an overwhelming preference towards MH diet. L: Low carbohydrate content; ML: Medium-Low; MH: Medium-High; and H: High. Means and confidence intervals were extracted from the mixed-effects model using the effects library (Fox et al., 2018) and back-transformed.