It’s not just Jurassic Park anymore: scientists are making progress bringing back extinct animals through cloning, having even brought the Pyrenean ibex back to life, although it lived only for a few minutes. Australian researchers also reported last week that they successfully made embryos of a frog known as the Southern gastric brooding frog, although the embryos later died. So what does that mean for our favorite extinct animals? Scientists say it’s too soon speculate—and others warn of the unintended consequences of changing the ecosystem. But it’s not too soon to get the list ready of the species that should come back first—especially if we have to prepare our houses for a pet Tasmanian tiger. From a half-zebra, half-horse called a quagga to a white-spotted blue butterfly shut out of San Francisco by humans, see The Daily Beast’s picks for the species scientists should really be working on.

