Marila fuligula McGregor, Man. Philippine Birds, 1909, p. 199 (Marianne, Pelew).
Nyroca fuligula Phillips, Nat. Hist. Ducks, 3, 1925, p. 234 (Guam); Hand-list Japanese Birds, rev., 1932, p. 185 (Pagan, Saipan, Palau, Yap); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam); Mayr, Birds Southwest Pacific, 1945, p. 302 (Micronesia).
Aytha fuligula Hand-list Japanese Birds, 3d ed., 1942, p. 207 (Pagan, Saipan, Tinian, Guam, Yap, Palau).
Geographic range.—Breeds in Iceland, Europe, northern Asia. Winters in Europe, Africa, Asia, Malaysia, and parts of Oceana. In Micronesia: Mariana Islands—Pagan, Saipan, Tinian, Guam; Palau—exact locality unknown; Caroline Islands—Yap.
Remarks.—The Tufted Duck is a winter migrant to western Micronesia. It has been recorded only a few times and may be an irregular visitor. Flavin observed a duck, which he thought to be of this species, at Guam on January 19, 1946. Marshall (1949:221) reports that two Tufted Ducks were seen at Lake Hagoi in April 1945.
Aythya valisineria (Wilson)
Canvasback
Anas valisineria Wilson, Amer. Ornith., 8, 1814, p. 103, pl. 70, f. 5. (Type locality, Eastern United States.)
Nyroca valilisineria Reichenow, Ornith. Monatsber., 1901, p. 17 (Jaluit); Schnee, Ornith. Monatsber., 1901, p. 131 (Marshalls); idem, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall Inseln).
Nyroca valisineria Phillips, Nat. Hist. Ducks, 3, 1923, p. 124 (Marshall Islands).