Different eye colouration in Hymenoptera

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Kriszta77
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Last seen: 3 years 6 months ago
Joined: 15/02/2016 - 10:18
Different eye colouration in Hymenoptera

I would like to ask for expert opinions on why some Hymenoptera species, e.g. Anthophora bimaculata, Nomada species exhibit various eye colours and how do they benefit from e.g having green or red eyes?

Many thanks for your help,

K Fekete

Ian Cross
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Last seen: 1 year 11 months ago
Joined: 13/05/2012 - 19:48
Eye colour in bees

Hi Kriszta

The short answer is that I have absolutely no idea. However, I have often wondered about this. There seems to be no consistent theme but I do notice that bright, pale blue or green eyes is often a feature of small, fast-flying summer bees such as the subgenus Heliophila of Anthophora. This includes bimaculata as you point out. Another is Megachile leachella - a small, fast-flying summer megachilid. On the continent other genera like Tetraloniella or Anthidium have pale-eyed forms. Again, it seems to be smaller, summer species that do this. Maybe the pale eyes are of assistance in rapid, highly-manoeuvrable flight - perhaps helping to reflect more light onto the back of the facets. The only problem with my theory is that there seems to be as many exceptions as there are species that follow the rule! But, as I say, this is only speculation. I would love to know if anyone else has any ideas.

Ian

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