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Insect Identification Key
Identify Insects in Michigan ... and beyond!

Your answer to the previous question was that your insect did not have the following set of characteristics: an elongated prothorax, so that its head is extended out in front of its body.

Pleated Hind Wing
This is a example of an insect with a pleated hind wing. Only the portion of the hind wing that is near the body (as indicated with the green arrow) is pleated. The pictured insect is a male dobsonfly (Corydalus imperiosus). Photograph credit: Atilano Contreras-Ramos.

Does your insect have a pleated section on the hind wing?

Extend one of the hind wings on your insect, and look at the lobe of the wing that is next to the body. See the photo. You are checking your insect for pleats, similar to fan folds, in this area of the hind wing. (Note: This area of the wing is called the anal lobe.)

Click one of the following:

Yes, my insect has a pleated section on the hind wing.

No, my insect does not have this feature.


I would like to return to the start of this key.



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Unless noted otherwise, photographs on this website are the property of the photographers and may not be reused without written permission from the photographers. To obtain permission, email the photographers here. High-resolution versions of many photographs are available.

Photos at the top of this website are (from left to right): potato beetle (Leptinotarsa decemlineata) — photo credit: Scott Bauer, U.S. Department of Agriculture; ebony jewelwing (Calopteryx maculata)— photo credit: U.S. Fish and Wildlife Service; sweat bee (Agapostemon splendens) — photo credit: Natalie Allen and Stephanie Kolski, U.S. Geological Survey; preying mantis, monarch butterfly (Danaus plexippus), hellgrammite (aka toe biter) larva and eyed click beetle (Alaus oculatus) — photo credit: Leslie Mertz, DailyGraceCards.com; Halloween pennant (Celithemis eponina) — photo credit: Kay Meng, U.S. Fish and Wildlife Service.

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