Plesiosaur
Argentinosaurus was the biggest hervivorous dinosaur that has a long neck.
There were a number of long-necked dinosaurs. One was the brontosaurus.
Janenschia is a dinosaur. It was a huge dinosaur with a long neck and tail.
Amargasaurus.
grass and leaves
Diplodocus.
A long neck dinosaur that eats plants
This depends on which long-necked dinosaur you are talking about. Heights varied between species.
The dinosaur with a long snout like an elephant is called a Brachiosaurus. It was a herbivorous sauropod dinosaur known for its long neck, small head, and nostrils located on the top of its head, giving it a resemblance to an elephant.
it has a long neck
mamenchasaurus
No, it is a sauropod. It has a long neck and tail and walked on all fours.