Mostly fence posts with ...

A couple of other things thrown in for luck.

A few fence posts behind the first leafing California Buckeye spotted:



Fence post with acorns:



Another fence post with acorns:



Leaning fence post with acorns:



And another fence post with acorns:



Close up of the definitive fence post with acorns:



Per some Googling, all of the above likely made by Acorn Woodpeckers (Melanerpes formicivorus)


Not fence post related: