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:
