The narrator identifies the large flying reptile in the Triassic segment as Eudimorphodon. While the narration is correct, the animation erroneously shows a different animal, Quetzalcoatlus. Eudimorphodon was a small, about seagull-sized animal with a short neck, a very long tail and prominent teeth. Quetzalcoatlus had a short tail, an extremely long neck, no teeth, a crest on its head, and was the size of a small airplane. It also lived in the Cretaceous, not in the Triassic, so the show is off by about 140 million years. Quetzalcoatlus does also appear in the Cretaceous episode, represented by the same model, and is correctly identified this time.
Ancient mammal-relatives such as gorgonopsids are shown with scales, but since these animals were not technically reptiles, they should have bare or perhaps even hairy skin.
Parasaurolophus' front feet are incorrectly depicted with four claws. These animals lacked claws on these altogether. Also, all individuals are shown looking the same, but young Parasaurolophus had shorter head-crests.
Small, long-tailed rhamphorhynchids are shown flying alongside Quetzalcoatlus in the Cretaceous episode. These animals went extinct in the Jurassic, about 70-80 million years before this scene takes place. In fact, this is the model they should have put into the Triassic segment instead of the Quetzalcoatlus.
The mosasaur is shown without a tail-fluke, which it was known to have had since 2011.