Caught this little BRAT in action today on my Crab Apple Tree. He's made some good progress with his holes, but the tree bloomed beautifully this Spring, so I'm not freaking out - too much.
Your friend and mine (not!) Mr. Yellow Bellied Sap Sucker:
I ***HATE*** that bird.
It has almost destroyed our mountain ash tree. Left oozing holes in it like your picture shows.
We wrapped the trunk loosely with chicken wire and put bird netting on as much as we could.
As fortune would have it, the power company came up the driveway clearing the trees near the lines and anything that looked dangerous enough to come down and take the lines out.
They took out two of the trees where the bird was always flying to. That helped some. Mr mm and DS took down another one that was leaning way too far over and was a good candidate for coming down in an ice storm or heavy early snow. We have not seen that bugger since then.
I’m hoping we disturbed it’s nesting site enough to chase it further into the forest. It isn’t like there aren’t enough other trees for it to choose to destroy.