dinosaurs
Dinosaurs.
Extinct animals
none they are already extinct
spotted owls
If I read this correctly you call them extinct.
paleontologist
It is extinct at UK, already bot not in the rest of the world. All kinds of animals extinct and made new, so it will be, also humans.
It is already in the game.
It has been estimated that 1 to 4 billion species of animals have already gone extinct. Some animals that have gone extinct are the American Mastodon, Dire Wolf, Florida Spectacled Bear, and the Dodo bird.
An extologyst.
You do not want them to become extinct, they are beautiful animals, it is already terrible they are in danger. Ways you can make them extinct are: Poaching Polluting Destroy their enviroment
possibly DNA duplication and genetic research to find the genetic code of the extinct species to possibly revive them