LARID^ — THK GULLS AND TKRNM. 225 



The great Burgomaster Gull is an Arctic species which occa- 

 ■^ioually visits Lake Michigan in winter. It is the largest of 

 the gulls, excepting only the Black-backed Gull, or "Saddle- 

 back" (Z. 7tiarmm). 



In Greenland, where it is almost a resident species, a few in- 

 dividuals (chiefly young birds) being seen in the very coldest 

 weather, it is said to pirate upon the eiders {Srmiateria mollis- 

 nma lorealU), often compelling them to surrender the mussels 

 which they have brought up from the bottom of the bays or 

 fiords. There, "the principal breeding place of this gull in the 

 vicinity of Ivigtut is close by the open sea, near the mouth of 

 the fiord, where they congregate in considerable numbers. In 

 August the young birds assemble in the fiord, espmally near 

 the narrow channels, as at Karsuk and Ellerslie, and feed dur- 

 ing that month and the next on the berries of Empetrum ni- 

 grum. At that season they are easily shot, and their flesh is of 

 a very savory flavor. The breasts of the young of all species 

 of gull are eaten here as a delicacy." * 



Larus leucopterus Faber. 



ICELAND GULL. 



Popular sy onym. White-winged Gull. 



Lanks argentaius Sabink, Trans. Linn. Soc. xii. 1818. M6 (not of Beunn. l"fiv 



Lanes leucopterus Fabeb. Prodr.Isl. Orn.1822. 91.— Sw. & Rich. F. B.-A. ii, 1831. 418.— NtriT. 



Man. ii, 1834, 3ft5.— Aud. Orn. Biog. iii, 1835, 553. pi. 2S2; Synop 1839, 327; B. Am. vii.lSM. 



159, pi. 447.— Lawb. in Baird's B. N. Am. 1858. 843 — Baird. Cat. N. Am. B. 1859, No. 6i<8. 



— CouES, Key, 1872, 311; Che.k List, 1873, No. 544; 2d od. 188-2. No. 769; B. N. W. 1874, 



622.— BiDGW. Noni. N. Am. B. 1881, No. 661; Man. N. Am. B. 1887. 2G.—B. B. & R. Water 



B. N. Am. ii, ISSt. 216.— .A.. O. U. Check List. 18S6. No. 43. 

 Lotus arcticus Macgill. Mem. Wern. Soc. v, 1824,i68. 

 Larus glaucoides "Temm." MEYEB.Taschenb. Vog. Deutschl. iv. 1822, 197.— Temm. PI. Col. 77e 



livr. Introd. Larus, 1828. 

 Lar^is islandicus Edmonst. Mem. Wern. Soo. iv, 1823, 506 (nee op. cit. p. 185=Z/. glaucus). 

 Larus minor Bbehm, Vog. Deutschl. 1831. 736. 

 Laroides subleucopterus Bbehm, t. e. 746. 

 Larus {Qlaucus) glacialis Beuch. J. f. 0. 1853, 101 (nee Macgill. 1824). 



Hab. Range about the same as that of L. glauciis. South in winter to coast of Massa- 

 chusetts and the Great Lakes. 



Sp. Chae. Similar to L. glaucus, but much smaller, the young dai-ker colored. Adult, 

 in summer: Mantle pale peail-blue (a shade darker than in L. glaucus); remiges similar, 

 but slighUy paler, passing terminally into pure white. Best of the plomaee snow-white. 



* M, Chambeblain, in The Auk; July 1889, pp. 2H-21."). 



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