The last time we went the peninsular pronghorns were very energetic, play fighting and carousing.
In their home range the peninsular subspecies is called los fantasmas del desierto, the ghosts of the desert, because of their cryptic coloration and great speed that allows them to disappear from view with almost supernatural quickness. Indeed, they can cruise at nearly 60 mph, tongues hanging out and mouths agape to admit copious amounts of air, for an hour at a time. That's one thing you won't see in a zoo though, since these pronghorns are far too relaxed to consider fleeing. Like me, after an afternoon spent watching them.