Brontosaurus
The two best known ones are Apatosaurus (Brontosaurus) and Diplodocus, both mid-Jurrasic types.
Argentinosaurus was the biggest hervivorous dinosaur that has a long neck.
Amargasaurus.
There were a number of long-necked dinosaurs. One was the brontosaurus.
Diplodocus.
A long neck dinosaur that eats plants
Plesiosaur
grass and leaves
This depends on which long-necked dinosaur you are talking about. Heights varied between species.
Long necked, herbivorous, quadrupedal dinosaurs were sauropods. Other long necked dinosaurs included ornithomimids or Therizinosaurs.
Janenschia is a dinosaur. It was a huge dinosaur with a long neck and tail.
it has a long neck
mamenchasaurus