Desperate times call for desperate measures...what an interesting hybrid that would make. Nothing you wouldn't see at any zoo, and not a first for ZooChat blospz.
You all realize that both animals are males (though its difficult to tell from this angle, if the Addra is indeed male). Mounting is also a display of dominance, not necessarily a means for reproduction.
It's also a playful behavior. At Busch Gardens Tampa, I was watching the cheetah and dog duo playing, and the female dog briefly mounted the male cheetah.
I was just going to ask if they were both males since they have horns. It may have very well been a sign of dominance. He started attacking him from the side, then kept doing it from behind. Although, I thought at one point I saw the gazelle arosed.
Why are these animals even in the same exhibit? They do not even live in the same habitat or countries. Is this is one of those general use antelope yards where surplus animals get thrown together?