diplodocus was long
Argentinosaurus was the biggest hervivorous dinosaur that has a long neck.
Lesothosaurus was a dinosaur that lived in what is now South Africa. It was a 3.3 foot long herbivorous dinosaur.
This depends on which long-necked dinosaur you are talking about. Heights varied between species.
Archaeornithomimus is an 11 ft long omnivorous dinosaur; so it ate some meat. Another omnivorous dinosaur was Citipati, and it was 9 ft long.
The largest dinosaur is Amphicoelias, at 200 ft long.
The scientific name of a long neck dinosaur is Brachiosaurus.
The second longest dinosaur is Argentinosaurus, at 140 ft long.
Janenschia is a dinosaur. It was a huge dinosaur with a long neck and tail.
some dinosaurs are 23 metres long
It depends on the Dino...
Seismosaurus, a herbivore and sauropod.