ian stirling, a genetic analysis was carried out on trio skins from various kunashir silver brown bears provided by the director of the reserve. kuril research results confirmed the hybrid origin of these bears, according to scientists, introgression occurred about 30,000 years ago during the next warming. after that, part of the hybrids moved to the south kuril islands. this morph may have survived through island isolation and re-hybridization with single whites. bear, however, there is another theory. unusual coloration is explained by embryonic, in other words, by closely related crossing of animals within one populations, which is generally explained by the relatively small size of the kuril islands and their isolation, however, some zoologists, white- brown colors even consider intraspecific diversity. in general, the brown bear is a very polymorphic species, it’s just such a concept, they can differ in color even in one litter maybe even milk and coffee. and maybe even blue black, in general, there are a lot of coal photos. i personally saw bears. just sveta coffee with milk. it's