Yellow-billed Loon - Gavia adamsii

Song: The wail call is a mournful two-syllable "aaawww-ooo" similar to a howling wolf. The laughing tremolo is similar to the Common Loon's but harsher, lower-pitched and with a slower tempo.

Sound: William W.H. Gunn (Macaulay Library, Cornell # 61481); 1972 Jun 11; USA, Alaska; Toolik River; Adult; Primary Sound;