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Photo#117434
Mayfly - Callibaetis - male

Mayfly - Callibaetis - Male
Chanhassen, Carver County, Minnesota, USA
June 9, 2007
Size: 9mm without cerci
Detail of turbinate eyes of male

Images of this individual: tag all
Mayfly - Callibaetis - male Mayfly - Callibaetis - male

Very nice photo
Reminds me of those Visible Man model kits, with almost a cutaway look to it.

 
Mayfly
Thanks, Ron. Isn't he bizarre?

 
Certainly is!
Looks like it has an eye under the eye and that much of it is made of transparent plastic. Quite a find.

 
Outlandish, isn't it?
Until now, I didn't even realize that Baetids have a second pair of eyes beneath those 'scopes!

 
Mayfly
And another set too! Don't forget the Ocelli.

 
Compound eyes
Ah, I was counting compound eyes, but yeah, throw in the ocelli too. Now that sure is alien.
Whirligig Beetles, Anableps fish and spiders all have split or multiple eyes that serve to help them hunt ... but I wonder what good such extra sets would do to a mayfly?

 
As David said...
May flies live at longest 24 hours as adults, so the males must find willing & suitable females as fast as possible. Those giant eyes (& the multiple sets of them) help the male see where he's going & find a mate before his time runs out.

 
Mayfly
Thanks, that helps explain why the male has them and not the female.

 
Mayfly
It's all about a male showing off. "My, what big eyes you have."

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