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

Insect with two cerci
This is an example of an insect with two cerci, which are indicated with the green arrows. This illustration is of an insect that may be either winged or wingless, so it shows a combination — the left side is the wingless form, and the right side is the winged form. In reality, of course, the insect either has four wings, or it has no wings. Illustration is from Maxwell Lefroy's Manual of Entomology, which was published in 1923.

Your answer to the previous question was that your insect did not have hamuli.

Does your insect have two small cerci?

If your insect is very small, you may need a magnifying glass to see the cerci, which extend from either side of the tip of the abdomen.

Click one of the following:

Yes, my insect has two cerci.

No, my insect does not have any cerci.

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,; Halloween pennant (Celithemis eponina) — photo credit: Kay Meng, U.S. Fish and Wildlife Service.

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