Jonathan
Yes! They are cecropia moths mating. What a great thing to find! I am so jealous!!
They may actually stay in that spot for a day or two. Then she is off to lay eggs. How cool!
Here is the basics on the moth as you found on this website.
Larvae feed on leaves of various trees and shrubs including alder, apple, ash, beech, birch, box-elder, cherry, dogwood, elm, gooseberry, maple, plum, poplar, white oak, willow.
Adults do not feed.
These are found east of the Rocky Mountains, from Nova Scotia south to Florida.
What a great find!
