A rare white grizzly bear and her cubs, beloved across social media, were struck and killed following two separate car collisions just 12 hours apart.

Parks Canada said staff were mourning the “devastating” loss of the bear, affectionately known as Nakoda, and her cubs, who were seen foraging for dandelions by the roadside in May. The nickname means “friend” or “ally” in the language of the Stoney Nakoda nations.