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

Your answer to the previous question was that your insect has long antennae.

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?

Look carefully at your insect’s hind wing, specifically the section near the body (see the illustration). Can you see a few pleats there? These pleats allow the insect to fold the wing up against its abdomen when it is at rest.

Note: This section of the hind wing near the body is called the anal lobe.

Click one of the following:

Yes, my insect has a pleated section on each hindwing as described.

No, my insect does not have pleated hindwings.


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 the 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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