Saw these holes throughout the exterior wood panels. Client said he researched it and it looks exactly like woodpecker damage. For me I must admit I’ve not seen this type of pattern. While there were holes throughout, the wood was not rotted and did not appear to have WDI defects.
I found these marks(series of tiny holes in a line). I explained I wasn’t a bird expert, but the direction and pattern matched nesting areas for carpenter bee larva’s. So the marks could be from a bird, like a wood pecker, hunting for food.
The same type of damage I posted. The carpeter bees build chambers, and the wood pecker must have heard each individual larva. The house I inspected also had many larger holes, but I found no nests in the attic.
Looks to me as though whoever installed the siding or purchased it went to the second hand/blem lumber yard…I see this alot out here where blem products are sold but still used for Coded applications. There are usually signs in the store/yard that warn about the use of their materials for certain applications.
I think there are voids between the filler sheets, which are laid in strips at right angles below the face layer. That would explain the straight lines - insects crawl along the voids, woodpeckers hunt them down.