GeoGraph - photograph every grid square

Newburgh: native and alien pigeons on my roof

The Woodpigeon Columba palumbus is the UK's largest and commonest pigeon. Although shy in the countryside it is often tame and approachable in built-up areas.

The Collared dove Streptopelia decaocto is not native to the UK. Before the early 1950s it was a rare vagrant here but is now widespread with perhaps 200,000 breeding pairs. Its arrival was part of a huge expansion in the range of the collared dove which began in the 1930s, before which its European range was confined to the Balkans.