Tachybaptus ruficollis
When the oil – spill caused by the grounding of the Sea Empress occurred, 15th – 21st February 1996, the Milford Haven waterway was badly contaminated, most heavily as far upstream as the Cleddau Bridge. Little Grebes quickly left this area, moving to safer places, notably to Westfield Pill where their presence rose from 39 to 52 birds. None were recorded dead or visibly oiled, so their rapid evasive action was evidently effective.
Graham Rees
(Covers records up to and including 2008)
References
HAYCOCK. A. 2008. A review of the status of wetland birds in the Milford Haven Waterway and Daugleddau Estuary, A report to the Milford Haven Waterway Environmental Surveillance Group. Unpublished