What Caused These Holes on Log?

[Toasty-Yote]

Kinda odd holes in a piece of staghorn sumac. Very symmetrical and I would suspect a woodpecker or a human with a drill but then they turn and go lengthwise as well. Any ideas?

 

[Dan Freeman]

Carpenter bees

 

[stoveliker]

Those are bigger than the holes carpenter bees make here or in TN, that I have seen.
These are bigger than the thumb in the pic.

 

[CincyBurner]

Diameter of carpenter bee holes = 1/2".

PSU Extension.edu/carpenter-bees​

Article mentions "When the tunnel is about 1 inch deep, the bee turns at right angles to the initial hole and tunnels with the grain of the wood."

​

 

[stoveliker]

That's my point; it appears to me these are 3/4" dia.

 

[Jags]

Maybe they used a metric tape measure and got the translation wrong

 

[Simonkenton]

They do look like carpenter bees, but they are too large.

 

[xman23]

Woodpecker, when they think there's something in there you can't stop them.

 

[CatfishHunter]

Sasquatch holes.

When hunting chupacabras, the N. American Sasquatch will tap finger holes into logs to simulate the chupacabra mating call. I saw it on youtube