Razorbill

Alca torda – LLURS – Breeding resident and passage migrant

Razorbill – 2003-07 breeding

Alca torda – LLURS – Breeding resident and passage migrant Comparison with previous atlas: 1984-88 2003-07 Breeding confirmed 24 27 Breeding probable 1 Breeding possible excluded from total No of tetrads occupied 24 (of 478) 28 (of 490) Percentage of tetrads 5% 5.7% Razorbills nest mostly in loose colonies scattered around broken cliffs in cracks […]

Razorbill – 1994

Alca torda – LLURS – Breeding resident and passage migrant 1984-88 Breeding confirmed 24 Breeding probable Breeding possible No of tetrads occupied 24 (of 478) Percentage of tetrads 5% Breeding distribution seems to have changed little since the time of Mathew (1894). Assessing numbers, though, is even more problematical than for Guillemot, for a large […]

Razorbill – 1980s winter

Alca torda – LLURS – Breeding resident and passage migrant The BTO winter atlas showed that Razorbills were present in some coastal 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 17 birds. Small numbers were found […]

Razorbill – 1949

Alca torda britannica Mathew describes it as a common summer resident, but less numerous than Guillemot or Puffin, and mentions the following breeding stations: Caldey, St Margaret’s, Skokholm, Skomer, Grassholm, Ramsey and various mainland cliffs.  Breeds today in suitable sites from Cemmaes Head to Caldey.  Decreased during the recent war, probably because of oil-pollution. R.M.Lockley, […]

Razorbill – 1894

Species account from The 1894 ‘Birds of Pembrokeshire and its Islands’ by Rev M A Mathews