What's happen with this tree? I saw many holes on the branch
Mystery solved
The sapsuckers caused the damage by pecking horizontal rows of regularly spaced, small holes through the bark to the sapwood. Unlike other woodpeckers, sapsuckers do not drill these holes in search of grubs or worms but to drink the sap that oozes into the holes. I was amazed by the precision and .. perseverance.
Thanks Dora, interesting behavour.
Wow. That is interesting. Thanks.