They're also kept in San Diego and Los Angeles; and breeding regularly too!
Very nice photo of a shy and elusive ungulate. I've only seen and photographed them once in LA, and that was a youngster in the Children's Zoo nursery yard.
Thanks guys - the enclosure makes it easy to get a good view but a right pain to get a decent photo - the antelope is pottering about in the gloom under the foliage but you're photographing through aviary mesh with Florida sunshine glaring off it. Took a little bit of post-adjustment to get the image looking right!
This was one of the things I most wanted to see (certainly among non-natives) so was very pleased it offered no resistance!