Ask Mr. Smarty Plants

This particular member of the Mr. Smarty Plants Team once watched a gentleman downy (or ladderback) woodpecker bring three nestlings to a live oak trunk outside my kitchen window for pecking lessons. The little birds lined up and dutifully watched as Dad did a sample peck; then they would do their lessons. Over the years, other families used the same schoolroom, and there were little lines of pecks all around the (undamaged) live oak. I have since moved away from that tree,  but I wonder if it is still visited by my bird friends. Other birds that leave holes in bark, hunting for insects and sap are sapsuckers. They can actually do a little damage, but a healthy tree should be fine. The ants you see on the trunk are going for the same sap, unless they are on the way up to tend their aphid farms in the leaves. But on the bright side, what a neat way to attract butterflies down to where you can see them closely.