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Razorbill

Razorbills ©Mike Snelle

Razorbill

The razorbill has a characteristically thick, black bill, with a white stripe across it. It nests with other seabirds, such as guillemots, but prefers the lower ledges and rocky bottoms of cliffs and deep ravines.

Enw gwyddonol

Alca torda

Pryd i'w gweld

March to July

Species information

Ystadegau

Length: 37-39cm
Wingspan: 63-67cm
Weight: 590-730g
Average lifespan: 13 years
Classified in the UK as Amber under the Birds of Conservation Concern 5: the Red List for Birds (2021). Listed as Near Threatened on the global IUCN Red List of Threatened Species.

Habitats

Ynghylch

The razorbill is a medium-sized auk that nests on ledges and among rocks at the bottom of cliffs. It feeds on fish which it catches by diving from the surface and swimming underwater. Usually searching for fish in the upper 20 metres of the sea, it can dive very deep and has even been spotted by a submersible operating hundreds of metres down. Only coming to shore to breed, on land it stands upright just like other auks.

Sut i'w hadnabod

The razorbill is black above and white below, with a short, thick bill that has distinguishing white lines across the end. In winter, razorbills have white faces. The similar-looking guillemot is chocolate-brown in colour, and has a longer and thinner bill.

Dosbarthiad

Nests on coastal cliffs in seabird colonies, particularly in Scotland and northern England. May be spotted offshore around the UK's coast at other times.

Roeddech chi yn gwybod?

The razorbill's closest relative was the great auk, which became extinct in the UK in 1840 and was last sighted in 1852 off Newfoundland. It was hunted for meat, feathers, fat and oil, and as it became more scarce, was finally driven to extinction by specimen collectors.