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BTO Blueline
GREAT TIT
Parus major
Great Tit © Tommy Holden
 
Conservation listings

Europe: no SPEC category, secure
UK: Green

Long-term trend
UK, England: moderate increase
 
Status summary
Great Tits have increased steadily since the 1960s, with the exception of two brief periods of stability or shallow decline during the mid 1970s and late 1980s. Recent CBC/BBS and BBS results suggest that this increase is continuing, in all UK countries. A positive effect of more food provision by humans during winter is one possible explanation for the increase. Changes in different aspects of breeding performance are contradictory, but the recent upturn in CES productivity suggests that density-dependent competition is not yet affecting juvenile:adult ratios in the post-fledging period.
 
CBC/BBS UK graph
 
Table of population changes for Great Tit
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC/BBS UK 33 1967-2000 522 65 46 82    
  25 1975-2000 630 36 24 48    
  10 1990-2000 1179 22 16 27    
  5 1995-2000 1802 11 8 14    
CBC/BBS England 33 1967-2000 437 61 38 86    
  25 1975-2000 526 33 17 53    
  10 1990-2000 976 21 16 28    
  5 1995-2000 1484 10 7 13    
CES adults 17 1984-2001 87 1 . .    
  10 1991-2001 102 9 . .    
  5 1996-2001 104 -2 . .    
CES juveniles 17 1984-2001 89 -6 . .    
  10 1991-2001 105 -6 . .    
  5 1996-2001 107 -5 . .    
BBS UK 8 1994-2002 1537 19 13 24    
BBS England 8 1994-2002 1257 14 9 20    
BBS Scotland 8 1994-2002 104 25 0 57    
BBS Wales 8 1994-2002 128 31 12 53    
BBS N.Ireland 8 1994-2002 41 99 32 202    
BBS acknowledgement
 
CBC/BBS England graph
CES adult abundance graph
CES juvenile abundance graph
BBS UK graph
BBS England graph
BBS Scotland graph
BBS Wales graph
BBS N Ireland graph
 
Table of productivity information for Great Tit
Variable Period
(yrs)
Years Mean
annual
sample
Trend Predicted
in first year
Predicted
in last year
Change Comment
Clutch size 33 1968-2001 94 Linear decline 8.24 eggs 7.62 eggs -0.62 eggs  
Brood size 33 1968-2001 160 Linear decline 7.41 chicks 6.63 chicks -0.78 chicks  
Daily failure rate (eggs) 33 1968-2001 154 Linear decline 0.0066 nests/day 0.0032 nests/day -0.0034 nests/day  
Daily failure rate (chicks) 33 1968-2001 127 None        
Laying date 33 1968-2001 116 None        
Percentage juveniles (CES) 17 1984-2001 95 Smoothed trend 115 productivity index 101 productivity index -13%  
Percentage juveniles (CES) 10 1991-2001 111 Smoothed trend 111 productivity index 101 productivity index -10%  
Percentage juveniles (CES) 5 1996-2001 113 Smoothed trend 99 productivity index 101 productivity index 1%  
 
Clutch size graph
Brood size graph
Egg nest failure graph
Chick nest failure graph
Laying date graph
CES productivity graph
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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