Cities are an important habitat for a variety of birds, but the nine species most common in urban areas, according to the garden birds counts conducted in the period 2003–2006 decline.
There are obvious differences among the various individual species. Urban populations of great tit, blackbird, blue tit and finch thrive. They increase in numbers or at least remain stable. Other bird species do less well. In recent years, wood pigeon, house sparrow, jackdaw, starling and collared dove populations have been in decline in urban areas.