Carrion Crow - 1980s winter atlas

The BTO winter atlas showed that Carrion Crows 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 130 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. 

BTO atlas

Canada Goose - 1980s winter atlas

 

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

Buzzard - 1980s winter atlas

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 

Bullfinch - 1980s winter atlas

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

Brent Goose - 1980s winter atlas

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 

Brambling - 1980s winter

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

Blue Tit - 1980s winter

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 

Black-throated Diver - 1980s winter

Black-tailed Godwit - 1980s winter

The BTO winter atlas showed that Black-tailed Godwits were present in only two estuarine 10km squares during the winters of 1981-82, 1982-82 and 1983-84, both within the Cleddau Estuary complex  

The light blue colour represents 1-4 birds which is consistent with the Birds of the Estuary Enquiry (BoEE, now WeBS) results at that time.

Graham Rees

Black-necked Grebe - 1980s winter

Black-headed Gull - 1980s winter

The BTO winter atlas showed that Black-headed Gulls 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 1,491 birds.

Found extensively using wet pasture and newly ploughed land but all roosts reported were around the estuaries.

Graham Rees 

Blackcap - 1980s winter

The BTO winter atlas showed that Blackcaps were present in almost 40% 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 over 3 birds recorded per day.

Blackcaps visiting bird feeders has aided detection.

Graham Rees