Where I live in central Ohio, cecropias that overwinter in my house eclose within the same time window as the wild population. With you being in MN, I cannot claim that the same would hold true for you. My guess would be the wild ones would eclose later.

KC

Thanks. Do Cecropias relay on Temp or time to enclose?

I think it is time unless temp gets in the way. If it is too cold out for the moth to mature, time is going to take a backseat.