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
♦ ²DIET AND CONSERVATION STATUS OF CAPE CLAWLESS OTTERS IN EASTERN ZIMBABWE, J. R. A. BUTLER and J. T. DU TOIT, IUCN Otter Spec. Group Bull. 11 1995