Currawong

It's been a busy day and it was fortunate I managed to catch this currawong fairly early this morning. This bird had just finished having a drink at one of my many water bowls (those photos were taken very quickly and not very clear) and had then flown across to this branch where he proceeded to clean his beak against the tree. When I was cropping this I noticed grooves on his beak that must have been worn into the beak over many cleaning sessions. Not sure if you can see them and if I zoom in any further the photo becomes less clear.