Not yet considered as a breeding bird by many people but there are already feral populations breeding in several places in England and around Islay in Scotland and Strangford Lough in Ireland. About 730 adults in Britain and 80 in Ireland.
Delany, S. 1993 British Birds: 86, 591-599.
Ogilvie, M.A. & RBBP 1999 British Birds: 92, 176-182 & 472-476.
The following Bird On! sketch is available:
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From The State of the Nations Birds
Copyright © 2000 by Chris Mead