17 years ago, my house was the epicenter. Houses down the block had hardly any while our swing set, deck, poolside, etc. were completely covered. I now live about a mile away, and I just saw one casing in my yard this morning. Maybe it’s the long, cold spring we had around here. They are very patchy. Our neighbors don't have them. If you went back to your old house, I would be pretty sure it is overrun with them.