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Peach Tree Borers Mating: Sexual Dimorphism

Posted by August 2nd, 2006 at 12:00 am

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Moths

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Sexual dimorphism or miscegnation?
A friend sent this salacious picture to me, but I was unable to identify the participants. Could you help him? ” Whilst mowing the lawn this morning I observed the two bugs in the attached photograph (actually I should say I observed the two attached bugs in the attached photograph). “They” were flying around in the same position as they are in the photo. The big guy seemed to be in control. They landed on a leaf and waited for me to go get my camera. I have no idea what’s going on here.
Chris Given”

peach tree borers mating Peach Tree Borers Mating: Sexual Dimorphism

Hi Chris,
This really is an excellent example of Sexual Dimorphism, not miscegenation. The Moths are Peach Tree Borers, Synanthedon exitiosa. The larger one in control is the female. This moth is a pest on peach trees as the caterpillars burrow in the wood causing considerable damage. Since we are able to post so few letters, we get very excited when we open excellent photos like your friend’s. Thanks for sending it our way.

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  1. From Mydas Fly | What's That Bug? on 17 Jun 2011 at 12:04 pm

    [...] to a female Peach Tree Borer.  The Peach Tree Borers are also wasp mimics, as you can see in this photo from our archives.Mydas Fly Pupa0   I like ThisRelated Posts (09/15/2005)Mydas Fly (07/22/2005)Mydas Fly [...]

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