Photoreceptor metabolism and visually guided landing behaviour of flies / Jan TinbergenVisual pigment cycle, receptor potential and pupil mechanism in fly visual sense cells / Joseph Gemma Hubert RoebroekPhototransduction and light-induced mitochondrial activation in blowfly compound eyes / Martinus Hendrik MojetVision, pigments and structural colouration of butterflies / Primož PirihVision, pigments and structural colouration of butterflies / Primož Pirih