Cervines, equines and canines somewhat. Though the first two are the ones i like the most.
Snow Leopards and Jaguars both genders, female canines, horses both genders.
Definitely canines are my number one choice. I was unsure if I should select "human" or not? The reason being, that while yes, it would definitely be a dream of mine to find myself in a relationship with a woman who is understanding of my zoosexuality, and preferably a zoo herself. I kind of doubt I will ever find myself in such a relationship. Not only that, but I haven't had a human "girl friend" since the 8th grade. Like... does that even count at that age? I've only ever been intimate with dogs as it stands now, and realistically I don't see that changing in the near future.
Another thing that terrifies me is the fact that so many of these zoo relationships go south very quickly. And when I mean south, I down to the pits of hell south. I've known one zoo who's wife left him. She took the canines and pretty much everything they had together. Then she got vindictive for seemingly no reason and outed him on FaceBook a month later. His is not the only story I've heard of such a thing happening.
I'm still hopeful though, so for now I've selected both canine and human.