Fig. 5From: Longwing (Heliconius) butterflies combine a restricted set of pigmentary and structural coloration mechanismsPigment extraction. Wing scale lattice of different colored wing patches in H. doris morphs before (left) and after (right) extraction in acidified methanol (see Materials and Methods). While the blue patch remains blue colored, the green patch becomes blue and the yellow and red patches uncolored, confirming the presence of pigment in these scales. Scale bars: 200 μmBack to article page