The British Trust for Ornithology
MARSH TIT
Parus palustris
Marsh Tit © Tommy Holden
Conservation listings

Table 4/Amber
(25-49% Population decline)

Biodiversity Steering Group Conservation Concern List

Long-term trend
UK: Rapid decline
 
Status summary
Marsh Tit abundance has declined rapidly, despite improvements in breeding performance (nest failure rates at the egg stage (22 days, comprising 15 days incubation + 7 days laying) have fallen from 17% to 3%). Detailed demographic work suggests that the decline may have been driven by low annual survival and that increased nest predation and inter-specific competition are not responsible (G.M. Siriwardena, unpubl.). Marsh Tits require woods of more than 0.5ha in area (Hinsley et al. 1995) and there is evidence from the CBC that declines are steeper on smaller plots (G.M. Siriwardena, unpubl.). Increased woodland isolation, a loss of, or reduction in, woodland understorey vegetation due to grazing and reductions in dead wood availability may all have contributed to the decline (Vanhinsbergh et al. 2001).
 
 
Table of population changes for Marsh Tit
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC all habitats 31 1968-1999 55 -66 -75 -56 >50  
  25 1974-1999 55 -50 -61 -35 >50  
  10 1989-1999 53 -24 -36 -5    
  5 1994-1999 51 -22 -32 -7    
CBC woodland 31 1968-1999 39 -66 -76 -55 >50  
  25 1974-1999 41 -53 -67 -39 >50  
  10 1989-1999 43 -24 -38 -11    
  5 1994-1999 43 -22 -34 -11    
BBS UK 6 1994-2000 119 45 16 83    
BBS England 6 1994-2000 106 16 -9 46    
The Breeding Bird Survey is jointly funded by BTO, JNCC and RSPB
 
 
Table of productivity information for Marsh Tit
Variable Period
(yrs)
Years Mean
annual
sample
Trend Predicted
in first year
Predicted
in last year
Change Comment
Clutch size 31 1968-1999 13 None       Small sample
Brood size 31 1968-1999 22 None       Small sample
Daily failure rate (eggs) 31 1968-1999 20 Linear decline 0.0084 nests/day 0.0015 nests/day -0.0069 nests/day Small sample
Daily failure rate (chicks) 31 1968-1999 19 None       Small sample
Laying date 31 1968-1999 14 Linear decline day 118 day 111 -7 days Small sample
 
Insufficient data on CES
available for this species




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This report should be cited as:
Baillie, S.R., Crick, H.Q.P., Balmer, D.E., Beaven, L.P., Downie, I.S., Freeman, S.N., Leech, D.I., Marchant, J.H.,
Noble, D.G., Raven, M.J., Simpkin, A.P., Thewlis, R.M. and Wernham, C.V.
(2002) Breeding Birds in the Wider
Countryside: their conservation status 2001. BTO Research Report No. 278. BTO, Thetford. (http://www.bto.org/birdtrends)

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