An adventurous dunnock on the old dead rhus tree

I always associate dunnocks with running around on the ground beneath hedgerows or bushes, and sometimes directly beneath the sunflower feeder. So I was surprised to see this one standing openly on the tree trunk oa few yards from the sunflower feeder and in plain sight. 

I've always liked dunnocks, but fear for this one's safety when there are sparrow hawks around.