Colour cues are useful for the detection, recognition and discrimination of objects such as flowers, fruit, mates and traffic signs. General models of colour vision have recently been developed, and many new results have been obtained.
There are lots of open questions, and we try to address some of them:
1. Which animals, besides moths and geckos possess nocturnal color vision? Almut Kelber
2. Why have marine mammals lost their blue-sensitive cone? Are they colour-blind or do they use rods for colour vision? Almut Kelber in collaboration with Guido Dehnhardt and Christine Scholtyßek at the Marine Mammal Centre, Rostock
3. Why do some butterflies have a red-receptor where others don’t? How did this evolve, and what is the ecological relevance? Almut Kelber and Miriam Henze
4. Do dichromats learn colour in a relative way (learn the “greener” or “bluer” colour, as we can learn to discriminate between the higher or lower pitch of a sound) or in an absolute way (blue, green, yellow)? Almut Kelber
5. How does the receptor mosaic in a retina relate to the spatial resolution of chromatic and achromatic vision? Almut Kelber and Olle Lind
6. How do male damselflies see the three colour morphs of females, and how do females create their colours? Almut Kelber and Miriam Henze