There are several ancient hollow ash trees in the hedges around Goose Hill. Many years of repeated pollarding would have reduced the strain of large limbs on the trunk and allowed them to remain healthy for much longer. Trees like this are an undervalued wildlife resource and provide habitats similar to those provided by over-mature fruit trees. The exposed holes at the top of this one seem like an ideal potential barn owl roost.
This photo of the base of the hollow cavity of the tree clearly shows white feathers, the white splashes of droppings and (most characteristically) several fresh large black pellets.
A barn owl pellet from inside the tree. Small mammal populations can be estimated by analysing the proportions of bones from different species in these pellets. They are coughed up rather than excreted.
Herbie and Percy surveying the close proximity of this tree to the orchard containing my new barn owl box. Looks promising!