They have several Land Before Time terms. Bigmouths are Saurolophus and probably others. This name comes from the duck-like bill. Swimmer also means Saurolophus (and perhaps others) due to the fact they live around water. This is not actually accurate, as it is based on theories that the crests were used as snorkels or aqua-lungs and a set of footprints that appeared to have webbed toes. Hollowhorns are any lambeosaurines, named after the hollow crests. Duckbill is a name used in a single scene in The Land Before Time V to describe a hadrosaur skeleton. Cera's father says that "everyone knows how stupid Duckbills are", which offends Ducky's mother. However this term references an animal that had not even evolved until after the dinosaurs died out.
Species appearing in The Land Before Time:
- Saurolophus (Ducky, Ducky's Mother, Ducky's Siblings, Ducky's Aunt, Ducky's Father)
- Maiasaura (Mrs. Maia)