| Reference no. | McPhail, J.D. and R. Carveth, 1993 |
| Ecosystem | Juan de Fuca Strait |
| Status | native |
| Abundance | abundant (always seen in some numbers) |
| Lifestage | adults |
| Regional database | |
| Remarks | From CA-BC. Freshwater records from Vancouver and the Queen Charlotte Islands, the lower Fraser, the Liard, Stikine, Taku and Alsek Rivers and rivers of the central coast. Uncertain record from the Teslin River. Also Ref. 6885, 1998. First definite Bri |