Red-throated diver - 1980s winter atlas

Gavia stellata

The BTO atlas covering the winters of 1981-82, 1982-82 and 1983-84 shows a similar distribution to that described above.

The darker the colour, the higher the relative total count for each 10km square.  The darkest blue represents 8+ birds, with the highest count being 16 seen at Strumble.