BTO - Breeding Birds of the Wider Countryside: Tufted Duck

TUFTED DUCK
Aythya fuligula

Conservation listings

Europe: no SPEC category, secure
UK: green

Long-term trend

UK: shallow increase

Distribution maps

Maps and statistics from British and Irish
atlases can be viewed here.

Status summary

The colonisation of the UK by Tufted Ducks in 1849, and the subsequent spread, was aided by the spread of the zebra mussel, which had been introduced accidentally to Britain a few decades earlier. The long-term shallow increases shown by WBS and CBC, and the 15% increase in range in Britain between the two atlas periods (Gibbons et al. 1993) may indicate that population expansion and in-filling of range are still occurring. BBS data suggest substantial increase since 1994, in England and in the UK as a whole. The species' winter trend in the UK is also shallowly upward (Pollitt et al. 2003).

Table of population changes for Tufted Duck

Source	Period (yrs)	Years	Plots (n)	Change (%)	Lower limit	Upper limit	Alert	Comment
WBS waterways	27	1975-2002	23	47	-37	210
	25	1977-2002	24	28	-36	127
	10	1992-2002	28	37	-14	94
	5	1997-2002	28	9	-19	36
BBS UK	9	1994-2003	121	50	22	85
BBS England	9	1994-2003	103	26	2	56

Productivity information is not currently available for this species


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This report should be cited as: Baillie, S.R., Marchant, J.H., Crick, H.Q.P., Noble, D.G., Balmer, D.E., Beaven, L.P., Coombes, R.H., Downie, I.S., Freeman, S.N., Joys, A.C., Leech, D.I., Raven, M.J., Robinson, R.A. and Thewlis, R.M. (2005) Breeding Birds in the Wider Countryside: their conservation status 2004. BTO Research Report No. 385. BTO, Thetford. (http://www.bto.org/birdtrends) Pages maintained by Susan Waghorn and Iain Downie: Last updated 18 January, 2006