Grizzly bears 'thriving' in Alberta, science-based estimates show Alberta Environment and Parks estimates the total number of grizzlies in the province is between 856 and 973. In 2010, when grizzlies were listed as a threatened species in Alberta, the provincial population estimate was been 700 and 800 bears. Social Sharing CBC News · Grizzly bear in fall colours in the Canadian Rockies.(John E. Marriott, EXPOSED Wildlife Conservancy) Efforts to help the Alberta grizzly bear population recover are working and the province now has between 856 and 973 grizzlies, according to Alberta Environment and Parks. In 2010, the year grizzlies were listed as a threatened species in Alberta, the provincial population estimate was been 700 and 800.