The Brontosaurus is the familiar name for one of the most iconic dinosaurs, with its long neck and friendly, herbivoric nature. There has been some debate in the scientific community about the classification of Brontosauruses based on possible errors in fossil matching (until 2015, when it was proposed that it was a separate genus from apatosaurus), but the "classic" image has permeated throughout pop culture, including being used as the mascot for Sinclair Oil. It remains more visible as a symbolic representation of a friendly dinosaur, and has served that role in Muppet productions.
A grayish blue-green brontosaurus appeared on The Muppet Show in episode 513 and episode 516. He later appeared in Neat Stuff To Know & To Do, named Vinny Brontosaurus and performed by Kevin Clash.
Later, a red bronto appeared on Sesame Street, and would eventually gain an identity as Herb.