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BTO Blueline
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BTO Blueline
Prunella modularis
Dunnock © Tommy Holden

• Population

• Productivity

• Additional

Conservation listings
Europe: no SPEC category (concentrated in Europe, conservation status favourable)
UK: amber (species level, race occidentalis, 25–50% population decline; race hebridium, >20% of European breeders)
UK Biodiversity Action Plan: priority species
Long-term trend
UK, England: moderate decline
UK population size
2,163,000 territories in 2000 (1988–91 Atlas estimate updated using CBC/BBS trend: BiE04, APEP06)
Status summary
Dunnock abundance fell substantially between the mid 1970s and mid 1980s, after a period of population stability. Some recovery has occurred throughout the UK since the late 1990s, but the species is still amber listed. The cause of the decline remains unknown. In many lowland woods, canopy closure in the absence of forest management and increasing browsing pressure from deer are likely to have reduced the suitability of the habitat for this species (Fuller et al. 2005). There has been little variation in survival rates over time (Siriwardena et al. 1998a). Clutch and brood sizes, and the number of fledglings per breeding attempt all increased as the population fell. Egg-stage nest faliure rates are currently increasing, and are of NRS concern (Leech & Barimore 2008). Numbers have shown widespread moderate decrease across Europe since 1980 (PECBMS 2010).
CBC/BBS England graph

1967-2008: -34% (confidence interval -43% to -21%)

Population changes in detail

 Demographic trends

Fledglings per breeding attempt graph
Laying date graph
More on demographic trends
Additional information

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This report should be cited as: Baillie, S.R., Marchant, J.H., Leech, D.I., Renwick, A.R., Joys, A.C., Noble, D.G., Barimore, C., Conway, G.J., Downie, I.S., Risely, K. & Robinson, R.A. (2010). Breeding Birds in the Wider Countryside: their conservation status 2010. BTO Research Report No. 565. BTO, Thetford. (http://www.bto.org/birdtrends)

Pages maintained by Iain Downie, Mandy T Andrews and Laura Smith: Last updated 11.10.2010