1. Saber-toothed tiger

  2. Woolly mammoth

  3. Dodo bird

  4. Tasmanian tiger

  5. Giant ground sloth

  6. Irish elk

  7. Smilodon

  8. Quagga

  9. Glyptodon

  10. Passenger pigeon

  11. Megalodon

  12. Aurochs

  13. Haast's eagle

  14. Thylacine

  15. Steller's sea cow

  16. Moa

  17. Great auk

  18. Carolina parakeet

  19. Diprotodon

  20. Cave bear