Hollow apple trees are a key habitat for a lot of creatures though.
We have two inherited old apple trees. I trimmed a low limb off one and was shocked to see it was hollow. It has a massive mistletoe growing on it so it does well the hardy wee thing. I looked in the hole for mistletoe roots ha ha!! Taking these pictures I noticed daylight in the hole and spotted another hole on the other side.
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In the sticks near Peterborough