I got two sets of lady bugs and I thought most of them had flown away, but I'm still noticing them all over my yard over a year later so maybe they didn't fly very far.
If they're orangish in color (not to confuse them with the reddish lady bug) they're Asian Lady beetles. Over the past few years here in Michigan they have increased astronomically. Except last year there didn't seem to be too many of them. Usually when it starts to get cold in the fall we would see them all over the warm buildings........and they bite too but not bad.