Great Black-backed Gull

Larus marinus – GWYLAN GEFNDDU FWYAF – Breeding resident

Great Black-backed Gull – 2003-07 breeding

Larus marinus – GWYLAN GEFNDDU FWYAF – Breeding resident Comparison with previous atlas: 1984-88 2003-07 Breeding confirmed 25 21 Breeding probable 5 9 Breeding possible not included in total not included in total No of tetrads occupied 30 (of 478) 30 (of 490) Percentage of tetrads 6.3% 6.1% Great black-backs are top predators on the seabird […]

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 […]

Great Black-backed Gull – 1949

Larus marinus In Mathew‘s day there were only a few pairs resident on the islands, and he only mentions the Bishop’s Rock and St Margaret’s.  It has now greatly increased, and is found on all the islands, and along the whole coast, breeding.  At least 150 pairs Skomer and Middleholm in 1946. R.M.Lockley, G.C.S.Ingram, H.M.Salmon, 1949, The […]

Great Black-backed Gull – 1894

Larus marinus – Resident. A few pairs of this fine and powerful Gull nest upon the islands off our coasts. Mr. Mortimer Propert has taken its eggs on the Bishop’s Rock, near St. David’s, and we are informed by Mr. C. Jefterys, of Tenby, that a pair have nested on St. Margaret’s Island, a small island connected by a […]