Random photo: this is a tree in my front yard that I can't identify. The holes are from a red-headed red-breasted sapsucker (at least, that's what I normally see poking holes in my trees) (Thanks for the correction -- I totally knew that).
I'm told the technique involves drilling the holes to cause the sap to run, then returning a short time later to feast on the insects that show up. You can see the holes that have healed above the fresh holes.
