Sauroposeidon

Its head could reach about 16.5 to 18 metres (54 to 59 feet) high with its neck stretched up, making it one of the tallest dinosaurs ever.1

It was about 27 to 34 metres (89 to 112 feet) long, which is similar to the length of a blue whale.1

It weighed about 40 to 60 tonnes (44 to 66 short tons), as heavy as a herd of elephants.1

It was a plant-eater that probably ate leaves from the tops of trees, like conifers and early flowering plants.3

It lived about 113 to 110 million years ago, during the Early Cretaceous period.1

Its fossils were found in the U.S. states of Oklahoma, Texas, and Wyoming.1

Its long neck helped it reach high into trees to eat leaves without moving its whole body, like a giraffe's neck.1

Yes, it is a sauropod dinosaur, a type of long-necked plant-eater.1