Tiny holes on your trees could be a sign of bark beetles, sap suckers, emerald ash borers or carpenter bees. Some are dangerous and others won't harm your tree.
What It Means When Tiny Holes Appear On Trees (And What To Do Next)

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Tiny holes on your trees could be a sign of bark beetles, sap suckers, emerald ash borers or carpenter bees. Some are dangerous and others won't harm your tree.