Pronghorns are found throughout western and central North America. Although, they resemble Old World antelopes, they are not of the antelope species. They are their own separate species and are deer-like in appearance and have hooves. Pronghorns are also known as American Antelope, Prongbuck, Pronghorn Antelope, or Prairie Antelope. The males have horns that are 5-20 inches (13-51 cm) long, each with a prong. The females have small horns ranging from 1-6 inches (2.5-15 cm). I found these two with a group of Pronghorns in a Pinyon-Juniper forest area, close to the Grand Canyon.
Read more here: THE UNIQUE PRONGHORN and here: EVOLUTIONARY RELIC.
NOTES-IN-NATURE.ORG 
One of my favorite Southwestern animals. When I first moved to Arizona in 1990, it was not uncommon to see herds running across the low grasslands by the hundreds. Now I see them infrequently, and if I do, maybe small groups of a dozen or so. I was in Patagonia in 2016 and saw them across the rolling hills. Nice post. Thanks for the information and remembrance.
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I have have seen them less often in past few years here in northern AZ. They are wonderful animals to observe. Thanks for reading.
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