Grasshopper Warbler – 2003-07 breeding

Locustella naevia – TROELLWR BACH – Breeding summer visitor and passage migrant. Not recorded from December to March

Comparison with previous atlas:

Breeding confirmed82
Breeding probable7083
Breeding possible1111
No of tetrads occupied89 (of 478)96 (of 490)
Percentage of tetrads18.6%19.6%

Interpretation of the comparative results of the two surveys is difficult. Young conifer plantations occupied during the earlier survey had matured to a state of unsuitability by the latter one. The BBS found an increase, on a UK national basis, of 68% since 1994 and by 24% between 2006 and 2007. This may have been in response to favourable conditions at their African wintering grounds resulting in increased survival.

The 1988-91 National Atlas indicated maximum abundance in Pembrokeshire, so it seems safe to apply the UK wide BBS figure to the county plot. This being so, there were probably 480 – 670 pairs breeding in Pembrokeshire at the end of 2007, compared with an estimated 400 pairs in 1988.

Graham Rees. Pembrokeshire County Bird Recorder 1981-2007

Records extracted from the Pembrokeshire Bird Reports, which may contain more detail than shown here.

More about the Grasshopper Warbler in Pembrokeshire