The Cecropia Moth, the North America's largest native moth

Written by Urban Ecology Center
    Tuesday, 07 April 2020

Check out a find along the Menomonee River spotted by UEC Environmental Educator Brynne Drohan. At least 3 inches long, Brynne found a cocoon of a Cecropia Moth (Hyalophora cecropia), the largest moth in North America!

The caterpillar that made this cocoon would have started late last summer and likely spent a few days constructing this waterproof home and attaching it to this branch. This is important because this cocoon will be the home of the Cecropia moth pupae until mid to late spring! During the winter and early spring, it undergoes an amazing metamorphosis to transform into a colorful, nocturnal, 5-inch moth! The cecropia moth's wings are brownish with red near the base of the forewing. Host plants include box elder, maple, birch, basswood and elm, among others.


Check out this find along the Menomonee River spotted by UEC Environmental Educator Brynne Drohan. Cecropia Moth (Hyalophora cecropia)

Fun facts: these moths do not have mouth parts, do not eat, and live less than two weeks! 

34365436 10156483831403331 4742859374823735296 n

34401348 10156483831428331 8070249922915467264 n


A group of students had an extra treat last summer when a friend of the Center stopped by to release a Cecropia moth he’d raised. What a cool nocturnal critter! 

Upcoming Events

Event Listings

Backyard Wildlife Season I: Episode VI. The Faking Dead (Virginia Opossum).


Friday, May 29th

9:00 AM - 10:00 AM

More Details...

Find event


Email Sign-Up


* indicates required
Which Emails would you like to receive?

Connect Now

facebook instagram 2018 2 twitter linkedin

Get Involved

Become a member today!

Copyright © 2020 The Urban Ecology Center