Location
The Coastal Black Bear recognized by GSCO refers specifically to the Vancouver Island black bear (Ursus americanus vancouveri), found only on Vancouver Island, off the southwest coast of British Columbia, Canada. This population is completely insular, separated from the mainland by the waters of the Strait of Georgia, Queen Charlotte Strait, and Johnstone Strait. Their range covers the entire island, north to south and from the coastal shorelines up into the island’s interior forested mountains making Vancouver Island the sole geographic home of this distinct bear population.
Behavior
Coastal black bears on Vancouver Island exhibit behaviors shaped heavily by their marine influenced environment. They are highly food-driven, spending much of the year foraging along river systems, tidal zones, and dense forest edges. During salmon runs, they concentrate around streams and estuaries, where they develop strong fishing behavior and may consume large quantities of salmon in a short period an important driver of their larger size relative to mainland bears. They are generally solitary, but seasonal food abundance can lead to temporary tolerance of other bears in high-value feeding areas.
Description
The Coastal Black Bear of Vancouver Island represents one of North America’s most distinctive and isolated populations of American black bear. Found exclusively on Vancouver Island, this subspecies has been separated from mainland British Columbia and Southeast Alaska since the last Ice Age—an isolation that has shaped its genetics, morphology, and ecology in remarkable ways.
Vancouver Island black bears are notably larger-bodied, a classic example of island gigantism. They often display darker, glossier coats and exhibit broader cranial characteristics than their mainland counterparts. Their physical traits reflect thousands of years of adapting to a coastal island environment rich in marine resources.
Habitat
The Coastal Black Bear of Vancouver Island occupies a rich mosaic of temperate rainforests, rugged shorelines, and salmon-bearing river systems found throughout the island. Their habitat is defined by dense coastal forests dominated by western hemlock, cedar, and fir, interspersed with estuaries, tidal flats, and freshwater streams that support abundant salmon runs. This unique mix of old-growth forest cover and marine influenced food sources provides year-round foraging opportunities, contributing to the population’s larger body size and distinct coastal adaptations.
Remarks
Multiple genetic studies using both microsatellite and mitochondrial DNA confirm that Vancouver Island bears form a unique lineage distinct from mainland black bears of British Columbia and Alaska. Their long-term geographic isolation has resulted in reduced gene flow, more uniform genetic structure, and a clear divergence from adjacent continental populations.
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