Yes, they are. And they have a friend. On my way back from the GY ranch the other day I came upon these guys. To the left of this picture there was a group of about thirty buffs with half a dozen pronghorns grazing among them. But by the time I stopped and unlimbered the camera the antelope had moseyed over the hill, leaving a single sentinel standing broadside to me. By the time I made the shot he had turned and started away. He's that little y-shaped blip just to the left of center frame.
I didn't realize he'd be so tiny in the final picture. Clicking on the picture will bring up the larger version which makes it easy to see his smiling face.