Grey heron (Ardea cinerea) amongst visitors in Regent's Park, London, UK, April 2011. Photographer quote: 'It was fascinating to watch public reaction to the large numbers of herons in Londons parks. Whilst some people visit them regularly and even feed them, a surprising number have no idea what they are.' Did you know? Herons are usually very wary birds but in a few places, like here in Regents Park, they have become accustomed to people and are uncharacteristically tame.