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

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

Collophore and furcula
This insect has both a forked furcula extending from the tip of its abdomen, and a tube-like collophore in about the middle of its body, where it extends from the first abdominal segment. Illustration credit: Leslie Mertz

Does your insect have a collophore?

A collophore is a tube-like structure found in about the center of the insect on its ventral (belly) side. Insects with a collophore typically have a furcula, which is a forked jumping device. When alive, the insect holds the furcula against its ventral side (underside) with a tiny latch (called a tenaculum). When the latch releases, the furcula springs downward, propelling the insect into the air. Note: Insects that possess a collophore are small (0.2-10 mm in length), so you may have to use a hand lens or dissecting microscope to see the collophore. The furcula, if present, may be easier to spot.

Click one of the following:

Yes, my insect has a collophore.

No, my insect does not have a collophore.


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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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