What Herbivore Dinosaurs Had Spikes on Its Tail?

The fascinating world of dinosaurs is filled with a myriad of species, each unique in its own way. Among the array of herbivorous dinosaurs, one particular group stands out due to their distinctive feature: spikes on their tails. These plant-eating dinosaurs, or “herbivores,” used these spikes as a defensive mechanism against predators.

When you think of a dinosaur with spiky tail, the name that likely comes to mind is the Stegosaurus. Known for its iconic row of plates along its back and four sharp, menacing spikes on its tail, the Stegosaurus is a classic example of a spike tail dinosaur.

The Stegosaurus: A Spiky Tail Dinosaur

The Stegosaurus, whose name means ‘roofed lizard’, was a large herbivore dinosaur that lived during the late Jurassic period, around 150 million years ago. This dinosaur is easily recognizable by its two rows of large, bony plates along its back and its four long, pointed spikes at the end of its tail. These features make the Stegosaurus a prime example of a dinosaur with spikes on tail.

These tail spikes, also known as a ‘thagomizer’, were used primarily for defense. The term ‘thagomizer’ was coined by cartoonist Gary Larson in a Far Side comic strip, and it was later adopted by paleontologists in a humorous nod to the fictional character Thag Simmons, who met his end at the tail of a Stegosaurus.

With each spike measuring up to 60-90 centimeters (2-3 feet) in length, a swing from a Stegosaurus’ tail could deliver a powerful blow to any predator. This defensive strategy is a testament to the dinosaur’s adaptation to its environment, showcasing the survival tactics of herbivorous dinosaurs.

Other Herbivore Dinosaurs with Spiked Tails

While the Stegosaurus is the most famous example, it’s not the only dino with spiked tail. Other herbivore dinosaurs also sported spikes on their tails for protection. For instance, the Kentrosaurus, a smaller cousin of the Stegosaurus, had two pairs of long spikes at the end of its tail. The Ankylosaurus, another herbivorous dinosaur, had a large club at the end of its tail, which could have been used similarly to the Stegosaurus’ thagomizer.

Herbivores vs. Carnivores: A Tale of Dinosaurs

The world of dinosaurs was divided into herbivores and carnivores, each group adapting differently to survive. While carnivorous dinosaurs like the Tyrannosaurus Rex relied on their sharp teeth and claws to hunt prey, herbivorous dinosaurs like the Stegosaurus developed other means of protection. Their plant-based diet made them targets for carnivorous dinosaurs, hence the development of defensive features like the spiked tail.


In conclusion, several herbivorous dinosaurs, such as the Stegosaurus, Kentrosaurus, and Ankylosaurus, featured spikes on their tails. These spikes, or ‘thagomizers’, served as effective defense mechanisms against predators, showcasing the adaptability and resilience of these ancient creatures.

So, next time you think about a dinosaur with spikes on back and tail, remember the Stegosaurus and its fellow herbivores. Their fascinating features and survival strategies continue to captivate us, offering a glimpse into the intriguing world of dinosaurs.

Leave a Comment