Bison bison Bison bison is a member of the Bovidae or bovine family. The weight of the bison is approximately 1 tonne (2,200 lbs), earning the title of largest mammal of North America. The shoulders of the plains bison are at 6 to 6.5ft high...

Photos taken in Rocky Mountain National Park, fall 2012.

Erethizon dorsatum is commonly known as the North American Porcupine measures 60 to 130cm long by 17 to 25cm wide and weighs 3.5 to 18kg. A tail made of protective quills is the signature feature of E. dorastum . Individual quills measure approximately...

Photo taken in Rocky Mountain National Park, fall 2012.

Odocoileus hemionus columbianus (‘Columbian Black Tail Deer’) is the most common deer species west of the Cascades in Oregon. The size can vary depending on the habitat. A large, mature male can grow up to 90 cm tall at the shoulder and...