 Re: Marks in wood: dead oak >> Opinions !!
They do like remarkably like the dissections of trees with injection/implant wounds in Shigo's A New Tree Biology Fig 40-7 pg527, so I would quess if no such treatments were undertaken (which I think is a pretty sound bet!) then woodpecker is a good candidate..all around the same time too.
__________________ Sean  Trees are poems that earth writes upon the sky,
We fell them down and turn them into paper,
That we may record our emptiness.
- Kahlil Gibran
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