We have stacks of pine marten here Kitta . Very fierce little chaps, hated by the game keepers and predators of squirrels and birds eggs and little chicks amongst others. We have nut boxes for the squirrels and before we had a dog would see them during the day. Now we just see the reflection of their eyes at night.
However would they be going after honey bees? They are meant to love jam so maybe have a sweet tooth! I've seen mice tooth marks on my polys but much smaller than on your hive. A mystery indeed.
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