The American pouched rats, or pocket-gophers, constitute the third section, Geomyoidea, with the single family Geomyidae.
There are various species of ground-squirrels and gophers, which are very abundant.
Palustris), rabbits, black, gray, red and ground squirrels, gophers, and many small rodents.
It is the home of the Columbia black-tail deer, western raccoon, Oregon spotted skunk, Douglas red squirrel, Townsends chipmunk, tailless sewellel (Haplodcn rufus), peculiar species of pocket gophers and voles, Pacific coast forms of the great-horned, spotted, screech and pigmy owls, sooty grouse, Oregon ruffed grouse, Stellers jay, chestnutbacked chickadee and Pacific winter wren.
The policy of the government which protects game, both in the park and in the surrounding national forests, has induced elk, deer, antelope, mountain-sheep, bears, porcupines, coyotes, squirrels, gophers and woodchucks to take shelter here.
Coyotes or prairie wolves (of which there is a local sub-species, Canis nebracensis texensis), grey wolves, prairie dogs (gophers), and jack rabbits are common on the plains; less common are the grey wolf or lobo (Canis griseus) and the timber wolf; and there are several species of foxes, including the swift.
On the other hand, the scaly-tailed squirrels (Anomaluridae), the jumping-hares (Pedetidae), and the strandmoles (Bathyergidae) are exclusively African; while the sewellels (Haplodontidae) and the pocket-gophers (Geomyidae) are as characteristically North American, although a few members of the latter have reached Central America.
A few rodents have increased in numbers; the prairie dog especially is a pest in the alfalfa fields of the arid lands (as are pocket-gophers at places in the east).