These photos of a Polyphemus Moth, fat and eating steadily, reminds us our the natural world moves with its’ own rhythm. Getting ready for fall, the caterpillar eats until must pupate one last time. This larva seems to be in its last instar or growth stage before wrapping itself into a cocoon. See also Insects in Winter.
Polyphemus Moth Prepares for Winter’s Cold
It will probably spend the winter as a cocoon in the leaf litter beneath the Blackjack Oak it was eating. Next year it will emerge as a beautiful night-flying Polyphemus Moth.
We spotted this fluorescent green caterpillar hanging upside down from a Blackjack Oak (Quercus marilandica) tree.
The photo is good but it doesn’t do the caterpillar justice. It was luminous. The sunlight backlight the caterpillar as it ate the leaves of the Blackjack Oak. It is about five inches long and thick,
Identifying the Polyphemus Moth
After we spent several rapturous minutes madly shooting photos, we decided it was a Luna moth larva. But we were wrong. One of our group, an entomologist, had the book Caterpillars of Eastern North America by David L. Wagner, in his car trunk.
We debated and decided that the yellow lines that pass through the spiracles, confirmed that this is Polyphemus Moth. Spiracles are the pores on the side of the caterpillars body, that the animal breathes through.
Whitesbog in Brown’s Mill, NJ. It is located in the 1.1 million aces of Pinelands National Reserve. The Pinelands is commonly called the Pine Barrens. The Pine Barrens is located on the Atlantic Coastal Plain and habitat is known as a Pine-Oak Forest. To learn more about the Pinelands, visit the New Jersey Pinelands Commission.
Polyphemus Moth Life Facts
Polyphemus Moth lives across North America except for Arizona and Nevada
Habitats: barrens, woodlands and forests.
Host plants : apple, ash, birch dogwood, elm, hazel, hickory, oak, rose, and willow. Especially favors birch, rose, and willow family plants.
Natural history information was obtained from, Caterpillars of Eastern North America by David L. Wagner. (Amazon affiliate link) This book has 512 pages of butterfly and moth caterpillar photos and information.
See also: Moths of Philadelphia: A Checklist