Accipiter nisus – GWALCH GLAS – Breeding resident
The BTO winter atlas showed that Sparrowhawks 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 3 birds seen in a day.
It is likely the highest counts plotted reflected the maximum intensity of observer activity.
Graham Rees (County bird recorder 1981 to 2007)
Data collected by volunteers for the BTO. Lack, P. 1986 Atlas of wintering birds in Britain and Ireland. T & A.D. Poyser.