Creatures that live in the deserts of the Maastrichtian or travel to it are featured.
Recurring tropes are:
- Thirsty Desert: The desert locations are evidently hot and dry and not hospitable. The animals featured have their ways of adapting, or usually don't stay there for long.
The Dreadnoughtus segment provides examples of:
- Behemoth Battle: The main plot of the segment consists in a spectacular, violent fight between two gigantic Dreadnoughtus males (one who is said to weight almost 50 tons, even) for the right to mate with the females who came to the desert during the mating season. The fight itself is inspired in the ones elephant seal bulls have for the same reason in the present.
- Color-Coded for Your Convenience: The two main Dreadnoughtus males who star in the segment have different colors in order to make them stand out from each other. The younger newcomer has the reddish color typical for the males of the species, while the old bull who dominated the competition for two weeks has a more greyish color from all the desert dust his body has accumulated of all the time he has been in the mating grounds.
- Gentle Giant Sauropod: Averted. The Dreadnoughtus bulls are aggresive and brutal when fighting.
The Nemegt segments provide examples of:
- The Dreaded: The Tarbosaurus is naturally this for all the herbivores of the desert, who quickly give the hunter its space when it arrives at the oasis to have a drink.
- Gentle Giant:
- Both the Nemegtosaurus and the Mongol Titan are docile sauropods that tolerate smaller animals while drinking at a watering hole.
- The Tarbosaurus is also this, with one of them walking calmly across a herd of herbivores to get some water, and the rest of them just lazily lying around in the morning sun. The only time when they act threatening is when one of them snaps at a Velociraptor who bumps into it, waking it up.
- Ridiculously Cute Critter: The Mononykus is a fluffy little dinosaur coloured like a barn owl.
The Barbaridactylus segment provide examples of:
- Bait-and-Switch: The big tall-crested male that approaches the smaller morph looks like its going to chase it off... but courtships it instead.
- Brains Versus Brawn: The two male morphs of Barbaridactylus. The more "standard" males are large, aggressive, and often scare off or kill rival males whilst showing off to females with flashy shows of strength and stamina. The "sneaky" males instead take advantage of their resemblance to females as a means to avoid competition and covertly court the larger male's quarry behind his back.
- Dude Looks Like a Lady: Some of the male Barbaridactylus have small body sizes and shorter crests like females do, and use it to sneak by the bigger ones.
The Secernosaurus segment provide examples of:
- Thirsty Desert: The crowning and most straightly played example in the episode: the desert the Secernosaurus cross is so dry, the otherwise easily disolvable gysum can form huge dunes with it, and it takes its toll on the herd.
