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A photo of a Thick-billed Murre (Uria lomvia)
Thick-billed Murre

Thick-billed Murre

Uria lomvia

The thick-billed murre or Brünnich's guillemot (Uria lomvia) is a bird in the auk family (Alcidae). Adult birds are black on the head, neck, back and wings with white underparts. The bill is long and pointed. They have a small rounded black tail. The lower face becomes white in winter. This species produces a variety of harsh cackling calls at the breeding colonies, but is silent at sea. They differ from the common murre in their thicker, shorter bill with white gape stripe and their darker head and back; the "bridled" morph is unknown in U. lomvia - a murre has either a white eye-stripe, or a white bill-stripe, or neither, but never both; it may be that this is character displacement, enabling individual birds to recognize conspecifics at a distance in the densely packed breeding colonies as the bridled morph is most common by far in North Atlantic colonies where both species of guillemots breed. In winter, there is less white on the thick-billed murre's face. They look shorter than the common murre in flight. First year birds have smaller bills than adults and the white line on the bill is often obscure, making the bill an unreliable way to identify them at this age. The head pattern is the best way to distinguish first-year birds from common murres.
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Thick-billed Murres on Birda

Photos

Sightings

A photo of a Brünnich's Guillemot photographed in  Svalbard and Jan Mayen
Profile picture for Andrea Barberio
Andrea Barberio
Thursday 31 Aug 2023 - 11:00am
Svalbard and Jan Mayen
A map showing the sighting location
🦉
Nigel Fishburn
Thursday 31 Aug 2023 - 5:10am
United Kingdom
A map showing the sighting location
Profile picture for Danijel Turnšek
Danijel Turnšek
Sunday 27 Aug 2023 - 12:00am
Svalbard and Jan Mayen
A map showing the sighting location
Profile picture for Danijel Turnšek
Danijel Turnšek
Thursday 17 Aug 2023 - 10:15pm
Svalbard and Jan Mayen
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