The Imperial Moth

The Imperial Moth (Eacles imperialis) is a large moth, with a wingspan of 80–175 mm (​3 1⁄8 and ​6 7⁄8 inches) in adults.This specimen surprised me by landing in my backyard. Thanks to a comment from Hive account@sgt-dan about the Imperial Moth on my post about Fall Webworms, I remembered this visitor! Thanks, Sarge!

The moth in the above photo appears to have slightly tattered edges on her right wings, as if she had been attacked by a predator, perhaps a bird or a large insect.

Of course, well-bred ladies should not consort with rakes. _{Sorry, I just had to do that...}

This species has coloring that mimics decaying leaves, which affords it some measure of protection, especially in the autumn. This is particularly useful since the moths enjoy nibbling on the leaves of hardwood trees, such as oaks, elms, and sassafras.

The Imperial Moth has a wide geographical range in the Western Hemisphere — all the way from Argentina to Canada. In North America, the moths appear mostly between the Rocky Mountains eastward to the Atlantic Ocean. Several websites I visited noted their populations have decreased in their northernmost reaches in recent years, however. Reasons given are not certain, but are thought to be due to the use of pesticides, use of particular styles of outdoor commercial lighting, and confusion in reporting similar-appearing species of the Eacles genus.