Contents of report
Breeding Bird Survey
Common Birds Census
Constant Effort Sites
Nest Record Scheme
Waterways Bird Survey
Alerts
Summary
What the categories mean
Return to BTO Home Page
.
LESSER REDPOLL Carduelis cabaret
 
Conservation Listings Long term trend

Unlisted/Green
Biodiversity Steering Group
Conservation Concern List

UK: Uncertain
Lowland: Rapid decline

 
Status Summary
The CBC and CES each depend on rather small numbers of relevant plots and are unlikely to be representative of Redpoll populations in the UK, which are most abundant in the north and west of Britain. However, both surveys show rapid declines, which the CBC suggests began in the mid-1970s. The Redpoll's range has also contracted (Gibbons et al. 1993). It is unclear from the BBS whether the decline has ceased and, if not, whether it has occurred over a wider geographical area than that represented by the CBC and CES. The CES shows a moderate decline in productivity over the past 14 years and there is evidence that survival was lower during the population decline (Siriwardena et al. 1998a).
 
 
Table of population changes for Lesser Redpoll
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC all habitats 30 1968-1998 43 -90 -95 -84 >50 Unrepresentative?
  25 1973-1998 42 -94 -97 -91 >50 Unrepresentative?
  10 1988-1998 15 -80 -89 -68 >50 Unrepresentative? small sample
  5 1993-1998 11 -49 -70 -17 >25 Unrepresentative? small sample
CES adults 14 1984-1998 20 -75 . . [>50*] Small sample
  10 1988-1998 22 -67 . . [>50*]  
  5 1993-1998 20 -37 . . [>25] Small sample
CES juveniles 14 1984-1998 11 -82 . . [>50*] Small sample
  10 1988-1998 12 -61 . . [>50*] Small sample
  5 1993-1998 12 -37 . . [>25] Small sample
BBS UK 5 1994-1999 118 -18 -35 5    
BBS England 5 1994-1999 47 -60 -75 -37 (>50) Small sample
BBS Scotland 5 1994-1999 38 -9 -40 38   Small sample
The Breeding Bird Survey is jointly funded by BTO, JNCC and RSPB
 
 
Table of productivity information for Lesser Redpoll
Variable Period
(yrs)
Years Mean
annual
sample
Trend Predicted
in first year
Predicted
in last year
Change Comment
Daily failure rate (eggs) 30 1968-1998 11 None       Small sample
Laying date 30 1968-1998 13 None       Small sample
Percentage juveniles (CES) 14 1984-1998 22 Smoothed trend 175 productivity index 100 productivity index -43%[>25]  
Percentage juveniles (CES) 10 1988-1998 24 Smoothed trend 109 productivity index 100 productivity index -8%  
Percentage juveniles (CES) 5 1993-1998 21 Smoothed trend 102 productivity index 100 productivity index -2%  
 

Insufficient data on clutch size
available for this species

 

Insufficient data on brood size
available for this species

 

Insufficient data on nestling failure
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. (http://www.bto.org/birdtrends)

[ Welcome | Contents | Introduction | CBC | WBS | BBS | Heronries | CES | NRS | Alerts ]
[ Summary | Discussion | References | Help | BTO Home Page ]

© British Trust for Ornithology
BTO, The Nunnery, Thetford, Norfolk IP24 2PU
Tel: (+44) (0) 1842 750050 Fax: (+44) (0) 1842 750030 Email:

Last updated: 7 August, 2001

Page created by Susan Waghorn