Make sure you get there early if you can! The zoo often gets pretty busy by the early afternoon. If you arrive near opening, you could be pretty much finishing up by the time the crowds get there. For interesting species, there are quite a lot, so I would really suggest going through the whole zoo. The trail with the cheetahs has dama gazelle, sitatunga, scimitar-horned oryx, and maned wolf. The Asia Trail has clouded leopards, and of course giant pandas. The small mammal house has northern Luzon giant cloud rat, black howler monkey, sand cat, black-footed ferret, and damaraland Mole rats. The Reptile House has both cuban and Philippine crocodiles, as well as spider tortoises. There are also of course just about all your classic ABC animals- two tiger subspecies, african lion, asian elephant, gorillas, both types of orangutans, california sea lions, zebras, and more! The website has a really accurate animal list if you are wondering everything you could see. On my visit last year, I saw just about everything except the Kids Farm, and was very impressed by the zoo. Hope this helps and enjoy the zoo!