Walking along by Bridge of Dee, you pass over a small medieval footbridge. This was moved from Holburn Street for road widening. Under the footbridge runs a stream, emerging from a sinister grated tunnel. This is a lost river or stream of Aberdeen, most of which are now routed underground, but can sometimes be found in unexpected places where you hear running water.
The little bird is a Dipper, which feeds by water. I had not seen one so close before. They are very swift and acrobatic flyers.