| Creature Description | | Appears in |
| human torso bound to horse's body, skinless | |
| guards Cirith Ungol | |
| speculative color changing primate | |
| future arboreal cephalopod | |
| reptillian/avian hybrid, kills with stare | |
| saber toothed marsupial | |
| largest known amphibian of all time. | |
| can see through time, wiped out in time war. | |
| 9 foot, blue humanoid. | |
| giant Eocene whale. | |
| midgard serpent | |
| 25 meter wingspan, blue sagittal crests | |
| largest land arthropod | |
| two legs, originally four, two pairs fused. | |
| future flying fish | |
| flightless killer birds (past) | |
| gliding membranes, climbs trees by digging its dagger hands into the bark | |
| six legged dear. fan structures on head | |
| speculative arboreal dinosaur | |
| goat/lion/snake hybrid | |
| buries itself underground to absorb nutrients, trees growing on back | |
| flying steed of the nazgul | |
| spiraling, carnivorous zooplant | |
| sail-backed predacious pelycosaur | |
| only contemporary species of Homo | |