- Accidentally Correct Writing:
- In "Giant of the Skies", the tapejarids are depicted as having black bodies and red crests. In 2017, a tapejarid was discovered with preserved melanosomes (pigment cells). Guess what colors its body and crest were.
- The Deinosuchus shown in Death of a Dynasty, which has a gharial-esque head and is described as weighing about one ton, is actually very similar to the largest crocodylomorph actually known from the Hell Creek area: Thoracosaurus.
- Accidentally Correct Zoology:
- The dromaeosaurid from "Death of a Dynasty" was seen as an example of Anachronism Stew, as Dromaeosaurus (what the animal was called during production despite its flaws) was extinct by the K/Pg extinction. Skip ahead to 2015, and a dromaeosaur just the right size to match with this creature was discovered in the exact formation the episode takes place in (Dakotaraptor).
- While the show's placement of Utahraptor in Europe is still an egregious example of Misplaced Wildlife, isolated teeth of a large dromaeosaur from the Isle of Wight were later uncovered, from the same time and place as when the episode was set. However, they appear to belong to a velociraptorine, while Utahraptor was a dromaeosaurine.
- Actor Allusion: From the 3D movie, this wouldn't be the first time John Leguizamo played a prehistoric animal, although this time he's playing a bird. And not the first time he's been surrounded by dinosaurs.
- Executive Meddling: For the Walking with Dinosaurs movie, 20th Century Fox decided to add voices to the dinosaurs to help kids get the film, but the decision was made really late in production to the point where there isn't even lip syncing. The majority of viewers disliked the change, as they found the voices annoying and distracting. The DVD thus contains a "Cretaceous cut", which cuts out all the voices.
- Follow the Leader:
- Hey, It's That Sound!: Many of the sounds the Allosaurus makes in the original series are the exact same sounds the Velociraptors make in Jurassic Park, just with a slightly lowered pitch.
- Orphaned Reference: The 'Cretaceous Cut' (the dialog-free version) of The Movie leaves in a few gags that make no sense without dialog:
- In the theatrical cut, Alex explains some gorgosaurus stats to the viewer with close up shots and diagrams (and he keeps getting distracted by its tiny arms). The visuals for this scene are left in the Cretaceous Cut.
- The film gets inexplicably re-wound when Patchi falls in the river (originally, Alex questions Patchi's claim of diving in to save Juniper)
- There is a close up of one of the knocked-out gorgosaurus teeth (which becomes the fossil in the present day scenes)
- The closing credits pop music starts to fade in and is interrupted by the gorgosaurus fourth wall break, but the actual credits with that song have been cut.
- Unintentional Period Piece: A subtle case as it is entirely due to Science Marches On, but the show is very much state of the art of dinosaurology in the late '90s. This is specially true for "Death of a Dynasty", which is an indirect listing of various theories about the extinction of the dinosaurs culminating with the asteroid hit. The general feeling of the episode is that dinosaurs were doing bad and the asteroid either made it worse or put them out of their misery, which is smack down between pre-asteroid, pre-Dinosaur Renaissance attitudes ("Dinosaurs were outdated monstrosities doomed to extinction") and current ones ("Dinosaurs were doing alright and would still dominate today if it wasn't for the asteroid"). Another telling point is the bizarre depiction of Quetzalcoatlus as a marine skim feeder, which had just been proposed in 1996 and was debunked a decade later.
- What Could Have Been: Baryonyx and Cetiosaurus were to appear in the main series, but they were replaced with Utahraptor and scrapped entirely, respectively.
Trivia / Walking with Dinosaurs