Corvus corax – CIGFRAN – Breeding resident
The BTO winter atlas showed that Ravens 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 74 birds seen in a day.
The largest roost recorded during this period contained 160 birds.
Data collected by volunteers for the BTO. Lack, P. 1986 Atlas of wintering birds in Britain and Ireland. T & A.D. Poyser.