Hi!
Noname, a member of the network54 forum raised a topic there which I find quite interesting. The article the land before time got in the online encyclopedia Wikipedia. You can take a look at the article here:
Wikipedia - The land before timeRemarkably there are two obvious mistakes in the article. The sharptooth in the original movie is named a carnosaur. That term however describes a group of meateating dinosaurs whose most famous representative would be Allosaurus. T-Rex (and the original movie's sharptooth was a T-Rex for sure) was not part of this group.
Ducky is said to be a Corythosaurus. This is definitely wrong. Corythosaurus was a species with a kind of semicircular crest on their head. If my memory doesn't fail me their species is the one which is named "hollowhorns" in LBT 8. They are definitely not Ducky's kind.
Ducky's species is still a matter of discussion. She has often been named an Anatosaurus. However, Anatosauruses, unlike Ducky, had no crest at all. She has been named a Parasaurolophus, but in that case her crest would have to a lengthening of the bridge of her nose. Moreover we see young Parasaurolophuses in LBT 4 and they look nothing like Ducky. I suppose she is a Saurolophus, a species resembling Parasaurolophus but with a smaller crest.