[Odonata-l] Sexual dimorphism question?

[Pilon, Michel]

Hello again,

I hope I don't annoy all of you with my naive questions... 

After reading the answers about my id's request and considering that in both case the sexual dimorphism is important, I would like to ask you the following question which came to my mind:

What justify that sexual dimorphism amongst dragonflies...?

With birds we know that the female is attracted by the colorful male and that she has to be duller because she has to lay over the eggs and should not be seen by predators...

Is it the same thing amongst Odonata? Does the female attracted by the male colors? And why usually are they duller than the male? (I'm thinking also of Sympetrum obtrusum (white-faced Meadowhawk))

Excuse-me again for my maybe so naive question...

Michel Pilon
Sherbrooke 
Quebec Canada

Mes Parcours Nature:
http://parcours.pilonm.org