What made the holes?

This morning there were two beak-sized holes between the sallow log and the western edge of Wbx.

One was larger than the other and both were of a conical shape that indicated they were likely to have been made by some large bird - a jackdaw or magpie maybe. It was not clear what they might have been looking for and it will be interesting to see how long they remain identifiable as holes, though I don't suppose there will be rare plants growing in them as in the grykes in limestone pavement.

Slugs or snails now appear to be getting up onto Wbx and they have started to eat the clover. Yesterday's bud has gone, so they obvioulsy made a bee-line (or slug line) for that.