The endagered ones. Also because it would probably make for a more interesting and diverse selection than any other plan could ensure.

Asian elephants! i would love to have a zoo centered around elephants, and polar bears. that would be awesome!

I would have an aviary...I love birds

There's a bird of prey centre near me, but I'd love to run a sanctuary for all different kinds of birds

I want to pick more than one.

I would keep the most endangered species of animals in attempt to show them to people, rise attention and help to save those species!

Wolves, definitely! I would build amazing huge enclosures for many wolves species.

Big cats! They are so noble and many of them are endangered....

Dolphins, orcas and other sea mammals. I think they are interesting and people have low chance to see them.

Foxes, because they are cute.

I would try to have a wide variety of endangered animals. That was people can learn about them and what they can do to help, and my zoo could also help with species repopulation.

Of cause the endangerd guys. They need the help!

Couldn't really decide between big cate and sea mammals, but finally I took the sea mammals.

All endangered species would be very important to keep there, but focusing on such beautiful, and disappearing, species as wolves would be nice...

All endangered species
I wanted to say big cats though but some would come under endangered

I'd like to do something like the "Parc des Felins" in Nesles, France. Only Cats in huge enclosures with many opportunities to take photos. Preferred without any visual borders. Just moats and such things. I'd try to get a pair of every species of cats, a big pride of lions and regular breeding.