Reminds me of one time a few years back (oh, yes, 'old git reminisces' warning). I was coming down the track leading off of the south side of Ordesa canyon, hot and tired and happy. In places the near vertical rock wall almost brushes your shoulder. I paused a moment and a Wallcreeper arrived right next to me: it would have been close enough to touch! A quick wing flick, a beady-eyed look around, and it was gone along the cliffside. No matter that it would have been impossible to photograph - it's one moment that's fixed and as vivid as ever!!
Brian