Fig. 8. `Relative colour learning' with M. stellatarum (experiment 5). (A) Six moths were trained to green as the rewarded colour (surrounded by a white circle) and lime and tested with green and turquoise (N=268). (B) Six moths were trained to green and turquoise using green as the rewarded colour, and tested with green and lime, under white illuminations (N=243). Colour constancy was tested under yellow illumination (N=35).