The Eternal Frontier
Giant Ground Sloth
A huge, slow ground sloth of an unspecified species.- Gentle Giant: It will not attack the Paleo-Indians, being a herbivore.
Saber-Toothed Cat
The most powerful and deadliest cat of all time.Short-Faced Bear
The largest and deadliest bear of all time, and the episode's main antagonist.- Big Bad: Of "The Eternal Frontier".
- Super-Persistent Predator: Rather than eating a dead mammoth, it chases a frightened Paleo-Indian and kills him. Justified, since the man's running triggered is prey response.
The Burning
Diprotodon
A giant wombat and the largest marsupial to ever live.- Herbivores Are Friendly: Isn't really that dangerous to the aborigines.
- Monster Munch: A Dirprotodon carcass is found in the episode, and it is implied to have been killed by Megalania. We actually see one get attacked midway through the episode.
Megalania
The largest lizard to ever live and the main antagonist of the episode.- Alas, Poor Villain: While it was only just a predator, it's hard not to feel some sympathy for it, considering it ends up being burned to death when it is helpless to escape.
- Big Bad: Of The Burning.
- Chekhov's Gun: In it's first appearance, it's noted to be sluggish at night, due to needing to heat itself with sunlight. At the end up the episode, it's killed when the aborigines set the grassland it was resting in on fire in early morning, when it is too sluggish to escape the flames.
- Cruel and Unusual Death: Anything that it bites will die of blood poisoning, due tp toxic bacteria in its mouth.
- On the flipside, it ends up being roasted alive at the end of the episode.
- Four Is Death: It encounters the aborigines four different times:
- The first time, it sees them around a fire at night, but is too sluggish to attack.
- The second time, it ignores them in favor of an easier meal.
- The third time it meets them, which is right after it attacks a Diprotodon, it does decide to attack them and ultimately kills one of them.
- The fourth time, the aborigines set the grassland on fire during the morning, while it is still warming up, leaving it helpess to escape.
- Kill It with Fire: How it meets its end.
- Our Dragons Are Different: Quite possibly the closest thing ever to a real-life example—a massive, poisonous reptile that can easily kill humans, and is regarded as The Dreaded by people living nearby.
- Reptiles Are Abhorrent: Is the largest lizard to ever live and is the main antagonist of the episode.
- Super-Persistent Predator: Averted: it ignores the aborigines the first two times it encounters them, and while it does attack them the third time, at that point, they were the easier meal.
The End of Eden
Giant Moa
A large flightless herbivorous bird the Maori hunted for food.- Gentle Giant: It will not harm the humans.
- Kill It with Fire: how it meets its end.
Haast Eagle
The largest eagle ever to live and main antagonist of the episode.- Big Bad: Of "The End of Eden".
- Feathered Fiend: It hunts moas and humans.
- Kidnapping Bird of Prey: Probably one of the only birds that could have done this in real life.
- Slurpasaur: Live-acted by a harpy eagle.
- Super-Persistent Predator: It hunts the Maori at all costs.
