Black Swan
Cygnus atratus
Several dozen escaped birds (the species comes from Australia) reported in the last decade. Breeding reported in Northamptonshire, Lothian, Essex and Wiltshire 1996 or 1997.
Ogilvie, M.A. & RBBP 1999 British Birds: 92, 176-182 & 472-476.
From The State of the Nations Birds
Copyright © 2000 by Chris Mead