On the belay of central groove yesterday I noticed a sparrowhawk chick peering out of a hole which obviously contains a nest. I didn't see any parent bird but if the chick is still alive there is obviously one around. The nest is about half way between central groove and the spike belay on climber's club. Fruitflancase and Gideon pass through this area and may be better avoided for the time being. I don't really know much about birds and others may know a little more regarding how easily disturbed they are or how aggressive the adult birds may be in terms of protecting nests. The chick was obviously unhappy about my presence on the belay and another climber close to the top of the first pitch of gideon.