Hi Dolly and welcome to the Forum!!
Can you show us some pictures of your bugs and your trees (close up of the damage and farther back to show the over-view of the trees).
Did you really mean the bug is boring into the tree and chewing it from the inside?
To my knowledge, earwigs can't do this. Usually they are a mixed blessing in a garden. They will eat a lot of other insects that you don't want, but, especially when present in big numbers, they will also eat seedlings and soft fruit. But established mature plants and hard fruits are supposed to be proof against them, which suggests they aren't equipped to chew up or bore into hard stuff.
Usually they eat leaves and the damage looks sort of like caterpillar damage. The leaves look torn up:
Here's an earwig VERY close up and magnified:
Here's yarrow flowers with an infestation of them, giving you a better idea of size:
it is still close up and a bit magnified, but if you know what yarrow flowers look like, that will give you an idea.
(I had to look through a lot of very creepy pictures, before breakfast, to find those for you! ugh! I try to be non-judgmental about God's critters, but earwigs are some of the creepiest to me!)