Bats in the Belfry

With the El Nino rains this past week my garden is in transition. The bird pack in the back yard has changed in population and temperament, many fall birds feasting until dark on seeds of weeds. But it turns out that isn't all that has taken up residence. If you look closely at the photo you will see little black specks on the edge of the rock plaque I made in  1958. Yes, 1958, when Lee and I first bought the house on Carisbrook in the Oakland hills. At that house it perched to the left of the front door. I put it together with rocks and wood from Maacama creek with the help of Willhold glue, and this is its third residence. I almost left it by mistake at Cathy Lane but the new owners rescued it for me.
Now it seems a bat has taken up residence behind it and the little specks are bat guano. Just where either I or my house guest would step in or out of the front door. Now my hair is already speckled black and white but I dont think I want to add bat guano to the mixture. So my trusty handiman Ralph promises to relocate the newest resident next week. He promises me he wont harm it.
I wish I knew if this had some deeper meaning in the Native American culture. Please let me know if you do.