Locustella naevia – TROELLWR BACH – Breeding summer visitor and passage migrant. Not recorded from December to March
Comparison with previous atlas:
|No of tetrads occupied||89 (of 478)||96 (of 490)|
|Percentage of tetrads||18.6%||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.