Acorns that is!
I have mentioned before how big, beautiful and messy (leaves and limbs) all the oak trees are. Well, I didn't think about all those acorns.
It sounds like little bombs going off, sometimes like about twenty or more at a time, especially then the wind is blowing. I am so surprised that our patio table's glass top has not broken. At night it's the same.
I have swept them off both the top and bottom patios and the next day it's like they were not removed.
Needless to say the little chipmonks, etc. are loving them. Driving the dogs mad knowing and smelling them when they go outside.
So the great oaks are beautiful when in bloom and when leaves turn...however, raking the leaves, limbs and acorns are the price we pay.