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Common Birds Census
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GRASSHOPPER WARBLER Locustella naevia
 
Conservation Listings Long term trend

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

Biodiversity Steering Group
Conservation
Concern List

UK: Probable decline
 
Status Summary
Grasshopper Warbler was Amber-listed because of a contraction in range up to the 1988-1991 Atlas, reportedly due to habitat loss (Gibbons et al. 1993). CBC analysis cannot be conducted reliably because of a small sample size but a rapid population decline is believed to have occurred. The BBS shows fluctuations in abundance but no net change. If given suitable habitat and conditions, the species has a high reproductive potential, demonstrated by a detailed analysis of the NRS dataset (Glue 1990).
 
 
Table of population changes for Grasshopper Warbler
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
BBS UK 5 1994-1999 59 -3 -34 41    
BBS England 5 1994-1999 26 -2 -44 73   Small sample
The Breeding Bird Survey is jointly funded by BTO, JNCC and RSPB
 
No productivity information 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)

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