FAMILY AL.CIDJE. AUKS, PUFFINS, AND MURRES. 



31 



* Group 3. Wing, 6.50 to 7.50 inches long. 



Bill, parrot like; underparts, white; back, black, usually a black 

 collar. Fratercula arctica, and races. Puffin. Sea Parrot. 



See No. 9. 



Adult in summer: General plumage, black; a white patch on 

 the shoulder; basal half of the greater wing coverts (feathers 

 forming the white patch on the shoulder), black. Winter birds 

 have the underparts white, and the upper plumage, mixed black, 

 gray, and white. Cepphus grylle. Black Guillemot. 



See No. 11. 



Similar to the Black Guillemot, but has the wing coverts entirely white and not with 

 basal half black. Cepphus mandtii. Mandt's Guillemot. 



See No. 12. 



Summer plumage : Head, back, wings, and tail, sooty brown; underparts and tips of secon- 

 daries, white. Winter plumage : Underparts, white, more or less marked with sooty brown, 

 or blackish about the throat, belly, and flanks. Uria lomvia. Brunnich's Murre. 



See No. 14. 



Summer plumage : Head and neck, back, wings, and tail, black ; tips of 

 secondaries and rest of underparts, white. Winter plumage : Similar, but 

 has the throat white. Alca torda. Razor=billed Auk. 



See No. 15. 



* Group 4. Wing, 7.50 to 8.50 inches long. 



Summer plumage : Head and neck, back, wings, and tail, black. Tips of secondaries and 

 rest of underparts, white. Alca torda. Razor-billed Auk. 



See No. 15. 



Summer plumage : Head, back, wings, and tail, dark sooty brown ; underparts and tips of 

 secondaries, white. Winter plumage : Underparts, white, more or less marked with sooty 

 brown or blackish about the throat, belly, and flanks; bill, usually over 1.60. 



Uria troile. Murre. 

 See No. 13. 



Similar to Uria troile, but has the head darker than the throat; bill, usually under 1.60. 



Uria lomvia. Brunnich's Murre. 

 See No. 14. 



* For directions for measurement, see page 9. 



