Giant hutia
The giant hutias are an extinct group of large rodents known from fossil and subfossil material in the West Indies. One species, "Amblyrhiza inundata", is estimated to have weighed between , big specimens being as large as an American black bear. This is twice as large as the capybara, the largest rodent living today, but still much smaller than "Josephoartigasia monesi", the largest rodent known. These animals were probably used as a food source by aboriginal humans. All giant hutias are in a single family, Heptaxodontidae, which contains no living species; this grouping seems to be paraphyletic and artificial, however.
Cascade golden-mantled ground squirrel
The Cascade golden-mantled ground squirrel ("Spermophilus saturatus") is a species of rodent in the family Sciuridae, in the order Rodentia. It is the largest species of the three within the subgenus "Callospermophilus." It is found in the Cascade Mountains in the province of British Columbia, Canada and the state of Washington, United States.