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
♦ ²Winter Diet of Atlantic Puffins (Fratercula arctica) in the Northeast Atlantic, Knud Falk, Jens-Kjeld Jensen and Kaj Kampp, Colonial Waterbirds, Vol. 15, No. 2 (1992), pp. 230-235