Sunday, September 18, 2011 at 4:10PM 
The BTO winter atlas showed that Great Crested Grebes were present in most coastal and 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 over 4-15 birds.
Graham Rees
Sunday, September 18, 2011 at 4:08PM 
The BTO winter atlas showed that Great Black-backed Gulls were present in most 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 over 60 birds, being concentrated in squares SM 80 & 81.
Graham Rees
Sunday, September 18, 2011 at 4:07PM 
Goshawks were recorded in only one square during the BTO winter atlas during the winters of 1981-82, 1982-82 and 1983-84.
Graham Rees
Sunday, September 18, 2011 at 4:05PM 
The BTO winter atlas showed the 10km squares where Goosanders were recorded 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 4-10 birds seen in a day.
Graham Rees
Sunday, September 18, 2011 at 4:03PM 
The BTO winter atlas showed that Goldeneyes were present in both estuarine and fresh water 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 over 27 birds, with up to 47 recorded in SM 91.
Graham Rees
Sunday, September 18, 2011 at 4:01PM 
The BTO winter atlas showed that Gadwalls were present in both estuarine and fresh water 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 over 23 birds.
Graham Rees
Friday, September 16, 2011 at 12:22PM 
The BTO winter atlas showed that Fulmars were present in most coastal 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 over 216 birds. Fulmars occupy their breeding sites on many days throughout the winter.
Graham Rees
Friday, September 16, 2011 at 12:15PM 
The BTO winter atlas showed that Fieldfares were present in most 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 over 500 birds.
However, it should be noted that the figures show a high correlation with the number of recording cards returned (therefore related to recording effort) for each 10km square.
Friday, September 16, 2011 at 12:14PM 
The BTO winter atlas showed that Feral Pigeons were present in most 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 over 115 birds.
However, it should be noted that the figures show a high correlation with the number of recording cards returned (therefore related to recording effort) for each 10km square.
Graham Rees
Friday, September 16, 2011 at 12:12PM 
The BTO winter atlas showed that Dunnocks were present in all 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 over 24 birds.
However, it should be noted that the figures show a high correlation with the number of recording cards returned (therefore related to recording effort) for each 10km square.
Graham Rees
