Illustration from Academy of Natural Sciences of Philadelphia/Corbis
Antilocapra americana oregona
Subspecies of Pronghorn Antelope
April 16, 1806, along the Columbia River just below Celilo Falls, Klickitat County, Washington, and Wasco County, Oregon.
A medium-size, deerlike mammal. Upper body pale tan or reddish tan; chest, belly, inner legs, cheeks and lower jaw, sides, and rump patch are white. Height: 35–41 in (88–103 cm); length: 4.1–4.8 ft (1.3–1.5 m); tail: 2.4–6.8 in (6–17 cm). Weight: male 90–140 lb (41–64 kg), female 75–105 lb (34–48 kg).
Grasslands, grassy brushlands, and particularly bunchgrass-sagegrass areas.
Near the border of Oregon, Idaho, California, and Nevada.
Possibly indistinguishable from pronghorn, according to DNA analysis.