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MARSH TIT
Poecile palustris
Marsh Tit © Tommy Holden
 

• Population
  changes

• Productivity
  trends

• Additional
  information

Conservation listings
Europe: SPEC category 3, declining
UK: red (>50% population decline)
UK Biodiversity Action Plan: in preparation
Long-term trend
UK, England: rapid decline
UK population size
52,800 territories in 2000 (1988–91 Atlas estimate updated using CBC/BBS trend: BiE04, APEP2)
Status summary

Marsh Tit abundance has declined almost constantly since BTO monitoring began.. The species' UK conservation listing has recently been upgraded from amber to red. Detailed demographic work suggests that the decline may have been driven by low annual survival and that neither increased predation nor interspecific competition is responsible (Siriwardena 2006). Nest failure rates have fallen during the period of decline. Marsh Tits nest in woods as small as half a hectare (Hinsley et al. 1995), but there is evidence from CBC that declines are steeper on smaller plots (G.M. Siriwardena, unpubl.). Reductions in the structural and floristic diversity of woodland, resulting partly from increased browsing by deer, are likely to have caused the decline (Perrins 2003, Fuller et al. 2005). Following declines elsewhere in western Europe during the 1990s, the European status of this species is no longer considered 'secure' (BirdLife International 2004).

 

Population changes

CBC/BBS UK graph
 
Table of population changes for Marsh Tit

Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC/BBS UK 38 1967-2005 86 -66 -75 -54 >50  
  25 1980-2005 102 -33 -48 -12 >25  
  10 1995-2005 162 -11 -22 2    
  5 2000-2005 153 -7 -18 9    
CBC/BBS England 38 1967-2005 80 -67 -76 -51 >50  
  25 1980-2005 93 -36 -51 -13 >25  
  10 1995-2005 147 -15 -27 1    
  5 2000-2005 137 -10 -24 10    
BBS UK 10 1995-2005 134 -4 -19 16    
  5 2000-2005 146 -11 -21 3    
BBS England 10 1995-2005 119 -11 -27 11    
  5 2000-2005 130 -12 -24 6    

BBS acknowledgement
 
CBC/BBS England graph
BBS UK graph
BBS England graph
 

Productivity trends

Table of productivity changes for Marsh Tit

Variable Period
(yrs)
Years Mean
annual
sample
Trend Modelled
in first year
Modelled
in 2005
Change Comment
Clutch size 37 1968-2005 13 None       Small sample
Brood size 37 1968-2005 22 None       Small sample
Daily failure rate (eggs) 37 1968-2005 19 Linear decline 0.8% nests/day 0.12% nests/day -85% Small sample
Daily failure rate (chicks) 37 1968-2005 19 None       Small sample
Laying date 37 1968-2005 13 Linear decline Apr 28 Apr 19 -9 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

 

Additional information

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This report should be cited as:
Baillie, S.R., Marchant, J.H., Crick, H.Q.P., Noble, D.G., Balmer, D.E., Barimore, C., Coombes, R.H.,
Downie, I.S., Freeman, S.N., Joys, A.C., Leech, D.I., Raven, M.J., Robinson, R.A. & Thewlis, R.M. (2007)
Breeding Birds in the Wider Countryside: their conservation status 2007.
BTO Research Report No. 487. BTO, Thetford. (http://www.bto.org/birdtrends)

Pages maintained by Susan Waghorn and Iain Downie: Last updated 7 November, 2008