Friday, September 16, 2011 at 12:04PM 
The BTO winter atlas showed that Common Sandpipers were present in six estuarine 10km squares during the winters of 1981-82, 1982-82 and 1983-84.
The darkest colour represents 2 birds seen a day, the lighter blue represents one bird in a day. The UK is at the northern extremity of the winter range of this species.
Graham Rees
Friday, September 16, 2011 at 12:02PM 
The BTO winter atlas showed that Common 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 up to 400 birds in a day.
Found extensively using wet pasture and newly ploughed land but all roosts reported were around the estuaries.
Graham Rees
Friday, September 16, 2011 at 12:01PM 
The BTO winter atlas showed that Collared Doves 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 50 birds in a day, reflecting winter flocking.
Graham Rees
Friday, September 16, 2011 at 11:59AM 
The BTO winter atlas showed that Coal Tit 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 18 birds in a day. Probably numerically under recorded in dense conifer plantations during winter when they do not normally reveal themselves by singing.
Graham Rees
Friday, September 16, 2011 at 11:58AM 
The BTO winter atlas showed that Choughs were recorded in most coastal 10km squares during the winters of 1981-82, 1982-82 and 1983-84.
The darkest blue on the map represents over 5-11 birds seen in a day, meaning immature birds were recorded as well as territory holding adults.
Graham Rees
Friday, September 16, 2011 at 11:57AM 
The BTO winter atlas showed that Chiffchaffs were present in 41% of 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 3 or more birds seen in a day.
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 11:54AM 
The BTO winter atlas showed that Canada Geese were present in only one 10km square during the winters of 1981-82, 1982-82 and 1983-84.
The mid blue colour in the square represents over 27-121 birds recorded in a day. About 100 Canada Geese remained in the Boulston area of the Western Cleddau which is where they were introduced in 1955.
Graham Rees
Friday, September 16, 2011 at 11:53AM 
The BTO winter atlas showed that Buzzards were present in most 10km squares during the winters of 1981-82, 1982-82 and 1983-84.
The darkest blue represents over 7 birds recorded in a day, the next lightest 3-6 birds, suggesting fairly even distribution.
Graham Rees
Friday, September 16, 2011 at 11:51AM 
The BTO winter atlas showed that Bullfinches 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 15 birds recorded in a day. The largest gatherings were due to birds from the surrounding neighbourhood gathering at good local food sources.
Graham Rees
Friday, September 16, 2011 at 11:50AM 
The BTO winter atlas showed that Brent Geese were present in two 10km squares during the winters of 1981-82, 1982-82 and 1983-84.
The light colour, of the10km squares represents 1-15 birds seen in a day, the most in Pembrokeshire being six.
Graham Rees
Friday, September 16, 2011 at 11:49AM 
The BTO winter atlas showed that Bramblings were present in few 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 41 birds.
Small numbers were erratic in occurrence in Pembrokeshire but occasionally larger groups gathered at good food sources, as shown on map.
Graham Rees
Friday, September 16, 2011 at 11:48AM 
The BTO winter atlas showed that Blue Tits 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 70 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