The Shiras moose, scientifically known as Alces alces shirasi, is the smallest and most geographically isolated subspecies of moose found in North America. Typically inhabiting the mountainous regions of the western United States and parts of Canada, these moose are well-adapted to a diverse range of habitats, from dense forests to open meadows. Shiras moose are characterized by their smaller size compared to other moose subspecies, with adult males, known as bulls, weighing between 800 to 1,200