Contents of report
Breeding Bird Survey
Common Birds Census
Constant Effort Sites
Nest Record Scheme
Waterways Bird Survey
What the categories mean
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RING OUZEL Turdus torquatus
Conservation Listings Long term trend

Table 4/Amber
(25-49% distribution decline)
Biodiversity Steering Group
Conservation Concern List

Probable decline
Status Summary
The New Breeding Atlas showed a decline throughout its range of 27% in the number of 10-km squares occupied between 1968-72 and 1988-91 (Gibbons et al. 1993). Reasons for the decline are unknown but the following have been suggested: afforestation, disturbance, climate warming and competition with Blackbirds. Declines in chick stage failure rates (14 days) from 28% to 9% may have occurred as the species retreats to its most favoured areas.
Annual breeding population changes for this species
are not currently monitored by BTO
Table of productivity information for Ring Ouzel
Variable Period
Years Mean
Trend Predicted
in first year
in last year
Change Comment
Brood size 30 1968-1998 25 None       Small sample
Daily failure rate (eggs) 30 1968-1998 12 None       Small sample
Daily failure rate (chicks) 30 1968-1998 16 Linear decline 0.0229 nests/day 0.0064 nests/day -0.0165 nests/day Small sample
Laying date 30 1968-1998 27 Linear decline day 135 day 128 -7 days Small sample
Insufficient data on clutch size
available for this species
Insufficient data on CES
available for this species



The report should be cited as: Baillie, S.R., Crick, H.Q.P., Balmer, D.E., Bashford, R.I., Beaven, L.P., Freeman, S.N., Marchant, J.H., Noble, D.G., Raven, M.J., Siriwardena, G.M., Thewlis, R. and Wernham, C.V. (2001) Breeding Birds in the Wider Countryside: their conservation status 2000. BTO Research Report No. 252. BTO, Thetford. (

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Last updated: 17 April, 2001

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