The holes have been there for a number of years and never seem to go away. What sort of insect causes them and will it cause problems for my trees?

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The holes have been there for a number of years and never seem to go away. What sort of insect causes them and will it cause problems for my trees?

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The rows of holes you are describing aren’t created by an insect, they are actually made by a bird. Woodpeckers create these rows of small holes in the bark of a tree, and then return on a regular basis to eat any insects that have taken up residence in those holes. It’s not an ideal situation to have open wounds in the bark of a tree since it is a defensive layer to various pathogens, but chances are that a vigorous tree can survive woodpecker damage if it isn’t too extensive.

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