When I was working, we had a perfect view of pigeons nesting high in a tree opposite our upstairs office window. We were all quite fascinated with their comings and goings as the eggs hatched and the parents fed the chicks. I put a pair of binoculars on the window sill so that staff could watch them. Then one morning, along came a magpie and took one of the chicks, then another. Before long the nest was empty. I know that this is natural behaviour and one shouldn't be sentimental about it, but it strikes me that the numbers are seriously out of balance now with the rest of the bird population, and maybe it is time for controls (I used the word cull upthread which seems to have raised at least one person's hackles) of some kind - between 1970 and 1990 their numbers in urban and suburban areas tripled (in rural areas they were said to have remained the same). They are now said to have stabilised but frankly I don't believe it. Even the RSPB control corvid numbers on their reserves where they have birds nesting whose populations are under threat, but suggest controls to help the wider bird population and they throw up their hands in horror. They can't have their cake and eat it. I don't really want to get into a debate about this; I'm just putting in my four penn'orth. Other, contrary, views are available.