I have a cabin in the low Sierras of Calif. [2400 ft elev.] . Here
they peck holes in which to put acorns.

When bugs invade the nuts they come back for a meal. But basically they
are not too bright.

I helped restore an old 2 room school house, the upper row of siding
had a complete line of holes.

When we pulled off the lower boards, we were showered with acorns.
They just kept putting them in.

Hope springs eternal. It does work for dead trees.

CP