A common sparrow

It's a common bird and one would normally walk past with nary a look at it.  But this time when a couple allowed me to get close and watch it preen, these birds were just as fascinating to watch as any.
The Eurasian Tree Sparrow is rather attractive if one goes by its shades of brown.  And it must be said too that these rich colours can only be appreciated when facilitated by photography.

This one was a sub-adult, still moulting, that eventually hopped off to preen by itself.