1189. Alca troile

Alca troile (Linn.), Syst. Nat. i. p. 220 (1766) ; (Hewitson), ii. p. 455, pl. cxxiv. ; (Gould), B. of E. v. pl. 396 ; id. B. of Gt. Brit. v. pl. 48 ; Dresser, viii. p. 567, pl. 621 ; Seebohm, B. Jap. Emp. p. 273 ; (Ogilvie Grant), Cat. B. Br. Mus. xxvi. p. 573 ; (Saunders), p. 699 ; (Lilford), vi. p. 83, pl. 38 ; Uria lomvia, Keys, and Blas. Wirbelth, p. 238 (1840, nec. Pall.); Naum. xii. p. 508, Taf. 331 ; U. ringvia, Brunn. Orn. Bor. p. 28 (1764) ; U. californica (Bryant), P. Bost. Soc. viii. p. 142, figs. 3, 5 (1861) ; Ridgway, p. 18 ; Tacz. F. O. Sib. O. p. 1219.
Guillemot troile, French ; Lumme, German ; Zeekoet, Dutch ; Langnefia, Langvia, Icel. ; Langnoebet Teiste, Dan. ; Spidsalke, Norweg. ; Sillgrissla, Swed.
Ad. (Yorkshire). Head, neck, upper parts, wings, and tail dark brown, the back tinged with slate ; secondaries tipped with white ; under parts below the neck white, the Hanks streaked with dusky brown ; bill black ; legs and feet blackish olivaceous, the webs less black ; iris brown. Gape 2.9, wing 7.7, tail 2.05, tarsus 1.05 inch. Sexes alike. In winter the upper parts are darker, the throat and sides of the head white, in places slightly mottled with brown, with a dark streak behind the eye through the white on the side of the head. The ringed variety, U. ringvia, differ 4 only in having a narrow ring round the eye, and a streak passing from the eye along the side of the head, white.
Hab. The North Atlantic Ocean, North Sea, and southern Baltic ; in winter south on the American side to New England, and on the European side down to about 30° ; the North Pacific Ocean south to Japan and Southern California.
Like the Razorbill it is a marine species, keeping in vast companies, obtaining its food chiefly by diving, and like it breeds socially on the ledges of sea cliffs, generally those over¬hanging the sea, the egg for only 1 is deposited, being placed on the ground, no nest being made. The eggs vary greatly, the ground-colour from white to deep blue or greenish blue, and the markings, which are sometimes mere spots, and at others contorted and fantastic lines, from reddish brown to dark brown and blackish, and in size they vary from 3.5 by 1.88 to 3.5 by 2.5.

A Manual Of Palaearctic Birds
Dresser, Henry Eeles. A Manual of Palaearctic Birds. Vol. 2. 1903.
Title in Book: 
1189. Alca troile
Book Author: 
H. E. Dresser
Page No: 
Common name: 
Thick-billed Murre
Uria lomvia
Vol. 2

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