Cold is not the problem. You're basically on their western boundary.

Polys and lunas will both eat birch, hickory, walnut, sweetgum, and American beech. Don't take this list as the only common trees. There are probably more.

A wild Cecropia hatched today, its wings are still crumpled and its been almost three hours since she hatched.

will she be able to still call in a male or not ?

She probably can still call in a male but you have to wonder whether she has a genetic defect that should not be passed on. I'd put her in the freezer for a few days.

I had a second Cecropia hatch in a different cage yesterday and it was in my greenhouse, and the door was open as well as a little side door on the cage and a male found his way into the cage! This female has a wingspan of Six inches!!!!!!!!