British Columbia supports a small breeding population of Western Grebes (Aechmophorus occidentalis) of less than 200 pairs, and a large wintering population, numbering tens of thousands of birds. Breeding occurs regularly at three sites in the southern interior: Shuswap Lake at Salmon Arm, the north arm of Okanagan Lake, and at Duck Lake in the Creston Valley. Numbers at Swan Lake (Vernon) have declined and breeding has occurred only once since 1966. A colony of 5-35 pairs existed in Williams Lake in the 1930s and 1940s, but declined until breeding ceased in the 1960s. There are two records (1986 and 1988) of a single pair with young at Westham Island near Vancouver. Breeding has also occurred at the south end of Kootenay Lake (one year) and Leach Lake (two years), both near Creston. Single breeding records, some of which might be erroneous, exist for 6 other sites. The principal cause of the decline or demise of Western Grebe colonies in British Columbia appears to be disturbance caused by recreational boati
Burger, A.E.. 1997. Status of the Western Grebe in British Columbia. Ministry of Environment, Lands and Parks. Species Status Report. WR87
Topic: Species status
Keywords: western grebe, aechmorphorus occidentalis
Scientific Name: Aechmophorus occidentalis
English Name: Western Grebe
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