Coal Tit - 1980s winter atlas

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