George Ord, Jr. was an American zoologist who specialized in North American ornithology and mammalogy. Based in part on specimens collected by Lewis and Clark in the North American interior, Ord's article "Zoology of North America" (1815), which was published in the second American edition of William Guthrie's Geographical, Historical, and Commercial Grammar, has been recognized as the "first systematic zoology of America by an American".

The Columbian ground squirrel is a species of rodent common in certain regions of Canada and the northwestern United States. It is the second largest member of the genus Urocitellus, which is part of the tribe Marmotini, along with marmots, chipmunks, prairie dogs, and other holarctic ground squirrels. They are stout, with short dense fur, which is characteristically tawny across the bridge of the nose. Social encounters sometimes are initiated with kissing behavior and the most common activity above ground is standing at attention. Residing in mountainous terrain and high plains in northern latitudes, they hibernate for 8 to 9 months of the year in burrows, which may be used for many years. They are emaciated when emerging in the spring. The Columbian ground squirrel came to the attention of the scientific community through writings produced by Lewis and Clark, while 21st century molecular genetics has more finely illuminated its ties with other close relatives.