Acorn woodpeckers drill big holes all year and stuff them with acorns for later use. The "community" of birds protects this acorn bank from raiders. There is always a few birds nearby.
Yes, nature always amazes me! Some creatures are so clever. I guess the nuts also attract bugs which the birds eat as well! Can't say it does the tree a lot of good, though!!
You are right, I'm sure. Down the river from this spot is an entire tree stuffed with acorns and the one they are nesting in has a lot as well. They definitely are a bitt off from bird normal....