Thick-billed murre
（重定向自Uria lomvia）
![](/Images/godic/202502/19/Uria_lomvia11708.jpg")
![Head color in breeding plumage is identical in all Brünnich's guillemots](/Images/godic/202502/19/Uria_Lomvia_1_71708.jpg")
![Breeding colony at Stappen, Bear Island (Norway). Note bill-stripes visible at a distance.](/Images/godic/202502/19/Uria_Lomvia_1_11708.jpg")
![Egg, Collection Museum Wiesbaden](/Images/godic/202502/19/Uria_lomvia_MWNH_04751708.JPG")
The thick-billed murre or Brünnich's guillemot (Uria lomvia) is a bird in the auk family (Alcidae). This bird is named after the Danish zoologist Morten Thrane Brünnich. The very deeply black North Pacific subspecies Uria lomvia arra is also called Pallas' murre after its describer. Murres have the highest flight cost, for their body size, of any animal.