Alcidae

Razorbill

Alca torda

Razorbill (Alca torda)
Pl. 1, RazorbillPhoto: Chme82
Scientific name
Alca torda
Family
Alcidae
Size
38 to 43 cm
Swedish Red List 2025
Not red-listed
Global Red List (IUCN)
Least concern (LC)

The Razorbill is a black and white auk with a short, heavy, deep bill. It breeds in colonies on cliffs and islands along the coasts of the North Atlantic, in Sweden mainly in the outer Baltic archipelago.

How to recognise it

  • Black head and upperparts, white breast and belly, male and female look alike
  • Short, deep, blunt black bill with a clear white band across it
  • White line from bill base to eye, and a long tail for an auk
  • In winter plumage the chin, cheek and parts of the head are white

Call and song

The Razorbill is a fairly quiet auk. In the breeding colonies it gives a deep, grating "urrr".

Where and when

In Sweden it breeds on cliffs and rocky outer skerries, mainly in the Baltic from Gotland and northern Småland to Ångermanland, and in north-west Skåne and Bohuslän. Stora Karlsö off Gotland is the largest colony in the Baltic, with 12 000 pairs in 2014 to 2015. It is reported most in October and November. Its share of all bird reports is highest in Gotland, Kalmar and Blekinge.

When is it seen in Sweden?

When is it seen in Sweden? Razorbill, January J Razorbill, February F Razorbill, March M Razorbill, April A Razorbill, May M Razorbill, June J Razorbill, July J Razorbill, August A Razorbill, September S Razorbill, October O Razorbill, November N Razorbill, December D
Share of all bird reports per month in Artportalen, 2016 to 2025.

Where is it reported?

Where is it reported? Kalmar: large share Gotland: large share Blekinge: medium share Skåne: medium share Halland: medium share Stockholm: small share Västerbotten: small share Norrbotten: small share Uppsala: small share Södermanland: small share Östergötland: small share Jönköping: small share Västra Götaland: small share Värmland: small share Örebro: small share Västmanland: small share Gävleborg: small share Västernorrland: small share Kronoberg: no reports Dalarna: no reports Jämtland: no reports
  • No reports
  • Small share
  • Medium share
  • Large share
Share of all bird reports per county in Artportalen, 2016 to 2025.

Reported most in October and November. Its share of all bird reports is highest in Gotland, Kalmar and Blekinge.

Food and behaviour

It often feeds in larger estuaries with lower salinity. Flight is straight with fast, whirring wingbeats, and it sits upright on land. The female lays one egg on a cliff ledge. After 17 to 23 days the chick jumps and the male follows it to sea.

Razorbill, another photo
Pl. 2Photo: Ron Knight

Easily confused with

  • Common Murre

    The Razorbill has an all-white armpit, a longer tail and a darker head than the Common Guillemot.

More auks

Photo: Chme82, CC BY-SA 4.0, via Wikimedia Commons, resized

Photo: Ron Knight, CC BY 2.0, via Wikimedia Commons, resized

The text was written with AI from facts in Wikipedia and may be shared under CC BY-SA 4.0. Sources: Swedish article, English article, German article

Report data: Artportalen (SLU Swedish Species Information Centre) via GBIF.org, 2016 to 2025. Red list: The Swedish Red List 2025, SLU Swedish Species Information Centre via GBIF.org.

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