It's not a photo. It's a long-running piece of news which was provided by the member "zoogiraffe" which says that an unamed ungulate species may be arriving at Chester Zoo.
Colchester have duikers, also I gather this is still the mystery animal that will also be the only ones in europe?
It won't be unicorns because I think there's bound to be an obscure zoo in the Czech Republic which already has them...
Nobody yet knows what is coming, I'm quite content to wait and see. I would bet there's more chance of unicorns coming than pronghorns.