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BTO Blueline
TREE PIPIT
Anthus trivialis

Tree Pipit © Peter Beaven

Conservation listings

Europe: no SPEC category, secure
UK: Amber (>50% population decline but data possibly unrepresentative)

Long-term trend
England: rapid decline
Status summary
The species has recently been moved from the Green to the Amber list, on the strength of its population decline.Tree Pipits occur in greatest abundance in Wales, northern England and Scotland, and thus the marked CBC decline between the two atlas periods may reflect the range contraction that has occurred in central and southeast England (Gibbons et al. 1993). Subsequently, CBC/BBS data for England have shown further decrease, levelling off in the late 1990s. Since 1994, the UK index has been stable: substantial decrease in England has been balanced by increases in Scotland, although no separate trend is available from there. The causes of the population decline are unclear, but may be linked to changing forest structure, as new plantations mature, and increased grazing pressure in woodland (Vanhinsbergh et al. 2001). Improvements have occurred in breeding performance, with a substantial increase in brood size and a decline in failure rates over the 17-day egg stage (13 days incubation and 4 days laying).
CBC/BBS England graph
Table of population changes for Tree Pipit
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC/BBS England 33 1967-2000 41 -78 -89 -59 >50  
  25 1975-2000 43 -80 -89 -65 >50  
  10 1990-2000 57 -64 -78 -45 >50  
  5 1995-2000 82 -20 -37 3    
BBS UK 8 1994-2002 122 1 -17 24    
BBS England 8 1994-2002 64 -27 -45 -5 (>25)  
BBS Wales 8 1994-2002 30 -8 -38 37    
BBS acknowledgement
BBS UK graph
BBS England graph
BBS Wales graph
Table of productivity information for Tree Pipit
Variable Period
(yrs)
Years Mean
annual
sample
Trend Predicted
in first year
Predicted
in last year
Change Comment
Clutch size 33 1968-2001 10 None       Small sample
Brood size 33 1968-2001 28 Linear increase 4.36 chicks 4.73 chicks 0.37 chicks Small sample
Daily failure rate (eggs) 33 1968-2001 12 Linear decline 0.0417 nests/day 0.0118 nests/day -0.0299 nests/day Small sample
Daily failure rate (chicks) 33 1968-2001 18 None       Small sample
Laying date 33 1968-2001 18 Linear decline day 146 day 135 -11 days Small sample
Clutch size graph
Brood size graph
Egg nest failure graph
Chick nest failure graph
Laying date graph
Insufficient data on CES
available for this species
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This report should be cited as:
Crick, H.Q.P., Marchant, J.H., Noble, D.G., Baillie, S.R., 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. (2004)
Breeding Birds in the Wider Countryside: their conservation status 2003.
BTO Research Report No. 353. BTO, Thetford. (http://www.bto.org/birdtrends2003)

Pages maintained by Susan Waghorn and Iain Downie: Last updated 16 February, 2009