Non-native Birds of Great Britain
The list of British birds comprises all those bird species which have occurred in a wild state in Great Britain. Since the Victorian era many bird species have been introduced to Britain, whether for sport, ornament or general experimenting, and some have established themselves whilst others have not. Others have escaped from captivity and established themselves, though many species either die out after a few years or die off in harsh weather. This page lists the bird species that have established colonies in the British Isles un-naturally, not including species who have become established in Britain naturally through range expansion from elsewhere. Escaped birds of certain species, e.g. ruddy shelduck , can cause confusion amongst birdwatchers as they occasionally occur in Britain as wild birds. The following species have established colonies in the UK at some point in time. They may have since died out, or new colonies established els...