The BTO winter atlas showed that Ringed Plovers were present in some coastal and all estuarine 10km squares during the winters of 1981-82, 1982-82 and 1983-84.
The darker the colour, the higher the relative total count for each 10km square. The darkest blue represents 19-60 birds.
The largest numbers were found within the Cleddau Estuary.
Graham Rees