Attributes / relations provided by
♦ ¹Food Web Relationships of Northern Puget Sound and the Strait of Juan de Fuca : a Synthesis of the Available Knowledge, Charles A. Simenstad, Bruce S. Miller, Carl F. Nyblade, Kathleen Thornburgh, and Lewis J. Bledsoe, EPA-600 7-29-259 September 1979
♦ ²"Foraging behavior and Diet of Streaked Shearwaters Calonectris leucomelas Rearing Chicks on Mikura Island", Kei Matsumoto, Nariko Oka, Daisuke Ochi, Fumihito Muto, Takashi P. Satoh and Yutaka Watanuki, Ornithological Science 11(1):9-19. 2012