There is no such thing as an extinct species because the order has made it their mission not to allow for any endangered species to be exterminated. The way that they have made this possible has been to take any endangered species and put them in locations that are completely hidden from humans. They even have some creatures that are thought to be prehistoric and still exist. The megalodon shark being one of them.
The order is going to preserve all the species that are thought to be extinct and release them back into the wild once their numbers in captivity grow large enough. All animal species known to man have specimens placed in captivity in order to protect them from a possible nuclear extinction. There is no reason to allow human mistakes to ruin the natural beauty of Earth and the animal life that this planet holds.