Anyone know what critter bored these holes?

I think those are from a nuthatch or woodpecker, looking for insects. Keep on
the lookout for borers, which will make fewer, but deep holes.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)