Great Black-backed Gull

Larus marinus – GWYLAN GEFNDDU FWYAF – Breeding resident

Great Black-backed Gull – 1994

Larus marinus – GWYLAN GEFNDDU FWYAF – Breeding resident 1984-88 Breeding confirmed 25 Breeding probable 5 Breeding possible not included in total No of tetrads occupied 30 (of 478) Percentage of tetrads 6.3% George Montague (1866) found none breeding in Pembrokeshire while Mathew (1894) knew of only a few pairs resident on some of the […]

Great Black-backed Gull – 1980s winter

Larus marinus – GWYLAN GEFNDDU FWYAF – Breeding resident The BTO winter atlas showed that Great Black-backed Gulls 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 60 birds, being concentrated in squares […]