Botaurus stellaris – ADERYN Y BWN – Sparse winter visitor. Not recorded from July to September
The darkest colour on the map for the BTO winter atlas of 1981-82, 1982-82 and 1983-84 represents 3 or more birds seen in a day. In Pembrokeshire 4 at Bosherston was the maximum.
Data collected by volunteers for the BTO. Lack, P. 1986 Atlas of wintering birds in Britain and Ireland. T & A.D. Poyser.