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What Does A Triceratops Eat? Surprising Triceratops Facts, Fossils, Plants

What The Triceratops Dinosaur Ate [Triceratops Horridus Dinosaur Diet] 

Venturing back to the age of dinosaurs always fascinates me, especially when considering the mighty Triceratops. With their massive skulls and towering presence, deciphering “what does a triceratops eat” has always been intriguing. These herbivores, wielding their three-horned faces, navigated the Cretaceous period, but what plants sustained them through their days, what do Triceratops eat?

What Does A Triceratops Eat? Surprising Triceratops Facts, Fossils, Plants

What Does a Triceratops Eat?

Triceratops, a herbivorous dinosaur, primarily ate plants such as ferns, cycads, and other low-lying vegetation. Its strong beak and sharp teeth allowed it to efficiently graze on these plants. Triceratops likely had a varied diet depending on the available plant species in its habitat.

The Triceratops was about 9.8 feet tall and 30 feet long and weighed up to 26,000 pounds. It was, in other words, a massive dinosaur.

The Triceratops genus existed in the Cretaceous period. As herbivores, Triceratops species consumed cycads primarily. Cycads, as ancient plants, thrived in the Cretaceous era. Triceratops individuals also fed on palms, simply understood through Arecales order remains.

Palms, along with cycads, formed part of the Triceratops diet. The plants called ferns additionally contributed to their nourishment. All Triceratops, due to their anatomy, could process low-lying vegetation effectively.

In paleobotanical studies, conifers emerged as a regular part of the Triceratops diet. Conifers provided dietary fiber to Triceratops, as seen in fossil evidence. The mosses also counted as possible food for them. These mosses offered diversity to the Triceratops diet. Fossil findings, precisely stomach stones, revealed the presence of gastroliths in Triceratops. Digestion in Triceratops involved these gastroliths for grinding plant material.

Their beak, distinctively shaped, allowed Triceratops to feed efficiently. The adapted teeth played a crucial role in shearing plants for Triceratops. This shearing action demonstrates Triceratops’ herbivorous tendencies. Bennettitales, now extinct plants, potentially were a food source for them. Establishing the diet of Triceratops helps us understand prehistoric ecosystems better.

By reflecting on the Triceratops’ feeding patterns, the complexity of Cretaceous environment interactions becomes apparent. Moreover, this examination brings to light Triceratops’ remarkable adaptations for survival as plant-eaters in their ancient world.

We have the answers ahead if you have more questions about the Triceratops’ diet. We’ll discuss its herbivorous eating habits, whether the Triceratops was prey or predator, and which plants it might have enjoyed.

Let’s get started!

What Type of Plants Did Triceratops Eat?

We know by this point that the Triceratops could use its body and facial features to access even taller plants and that this dino’s teeth were great for slicing and plucking. What did the Triceratops eat with these type of teeth? The Triceratops was thought to have eaten various plants. Fossilized stomach remains of fibrous plant material have been found, although it is impossible to determine exactly which plant it represents. 

Keeping the above information in mind and the plant species that existed during the Cretaceous Period, here are the types of plants the Triceratops might have eaten.


The cone-bearing trees known as conifers were a source of food, albeit one that was difficult for some dinosaurs to access and was certainly tough vegetation.

The beak of the Triceratops could have plucked conifers, and its wear-resistant teeth might have allowed the Triceratops to eat the cones or the needle-like foliage of a conifer tree.


Ferns still exist today and are beloved as indoor and outdoor plants. The foliage is thin and flimsy and thus would have posed no challenge to a hungry Triceratops who needed a meal.


Like conifers, cycads are seed plants. These trees include a woody, thick trunk and stiff pinnate leaves.

Again, cycads would not have been something that every dinosaur could eat. If a Triceratops could ingest conifers, cycads wouldn’t have posed much more challenge.


The flowering plant clade called the eudicots first appeared during the Cretaceous Period. The flowers are known for producing dual seed leaves. A Triceratops’ low-hanging posture could have allowed it to find eudicots easily and munch them up.


Today, magnolias are a coveted, beloved plant species. Back in the Cretaceous Period, the flowers could have been a meal of a Triceratops that was passing through. The magnolia flower usually grows on trees, so the Triceratops would have had to use its frills to knock down the flowers.


Oak trees also grew throughout the Cretaceous Period, giving way to species that today are plentiful in North America. Those include the white, Oregon white, bur, chestnut, northern red, southern red, pink, and black oaks.

Growing leaves of varying sizes and patterns, oak trees can stand 70 feet tall. It’s unlikely a Triceratops could have reached the branches of an oak tree unless they were low-hanging due to its height. The leaves on fallen branches could have been consumed, though.  


The deciduous tree species known as the beech emerged during the Cretaceous Period with oaks, and the next tree, we’ll talk about maples.

Beech trees stand at 50 to 70 feet tall, which means that the Triceratops would have been left to collect leaves from fallen branches if it wanted to ingest beech leaves.


The colorful maple tree we know and love today also originated during the Cretaceous Period. With more than 130 species, some of which are native to North America, the Triceratops would have had its fill of maples.

Even better, maples stand anywhere between 33 and 148 feet tall. A Triceratops would have easier reaching some smaller maple tree branches than a beech or oak tree. 

Triceratops Species

The genus Triceratops contains two widely recognized species:

  1. Triceratops horridus: This is the type species of the genus Triceratops, first described in 1889. It is one of the most well-known and iconic dinosaur species, recognizable by its large body, distinctive neck frill, and three facial horns.
  2. Triceratops prorsus: Also a well-documented species, Triceratops prorsus was described shortly after T. horridus. It is distinguished from the type species primarily by the shape of its horns and frill. (Source)

It is worth noting that, throughout the history of paleontology, several other species of Triceratops have been proposed, but many have since been reclassified or considered synonymous with either T. horridus or T. prorsus. The taxonomy of Triceratops species has been the subject of extensive research and debate, with some paleontologists suggesting variations might represent different growth stages or sexual dimorphism rather than distinct species.

In recent years, only these two species are widely accepted, while the status of other named species remains contested or has been dismissed. Additionally, new discoveries and ongoing research continue to refine our understanding of Triceratops diversity and taxonomy.

Is a Triceratops an Herbivore or Carnivore?

How do paleontologists and other dinosaur experts know whether a dinosaur species was an herbivore or a carnivore? They only have to look at the dino’s teeth.

For that reason, we can say with certainty that the Triceratops was an herbivore otherwise known as a plant-eater. This Cretaceous species had a beak-like appendage, with the top of the beak made of rostral bone. The beak, experts believe, wasn’t the best for biting, but it would have been fantastic for plucking and grasping. It is part of what points us in the direction of the Triceratops being herbivorous.

The Triceratops could have had somewhere in the ballpark of 800 teeth. The teeth were organized into what is known as batteries or groups. Up to 40 teeth would be arranged in the dino’s mouth per battery.

A tiny set of cranial fossil bones near a creature’s upper jaw, the premaxilla did not have teeth. It isn’t entirely uncommon, as some creatures lack teeth in the premaxilla.

In a Triceratops’ maxilla or a fixed upper jawbone were between 36 and 40 teeth in a battery. Some of the teeth in this battery were stacked on top of one another vertically, which is interesting. The location of these teeth was very close to one another, and the battery curved inward.

The fascinating thing about Triceratops teeth–besides their sheer number, that is–is how the teeth were designed, so to speak. Categorized as self-wearing, the Triceratops had to use its teeth to shape them.

That said, the teeth do have a different shape. According to a 2015 report from Live Science, Triceratops’ teeth were scalloped for slicing.

Here’s yet another cool fact about Triceratops teeth. The dinosaur species had five tissue layers. Today’s reptiles have dentine and enamel, and that’s it.

According to the Live Science article, the dentine and blood vessel layer of Triceratopses’ teeth, known as vasodentine, is only found in bony fish species.

Since the vasodentine layer was so porous, it didn’t wear down as easily. Even still, the Triceratops could continually replenish its teeth as it lost them from use. 

Is a Triceratops a Prey or Predator?

The name of the Triceratops translates to “three-horned face” due to the dual head horns and the front nasal horn of the dinosaur species. The Triceratops also featured a frilled skull.

Triceratops was one of many horned dinosaurs that existed during the Cretaceous in North America. Scientists believe that these and other horned dinosaurs lived in herds, possibly providing protection from carnivorous dinosaurs.

You might assume that the Triceratops was a ferocious predator with these intimidating features. Remember that this was one large dinosaur, although maybe not compared to some sauropods.

However, the Triceratops was largely regarded not as a predator but as prey. In general, herding animals are the key target of large carnivorous dinosaurs

Remember, the Triceratops didn’t eat other dinosaurs. Its head naturally hung low to reach plants. Although it had a large body, a thick tail, a beak, and horns, it used those mostly for reaching taller plants, not hunting down dinosaurs or other creatures.

What Hunted the Triceratops?

Primarily, it was the T. Rex. The Tyrannosaurus largely consumed herbivorous dinosaurs, with the Triceratops at the top of the list and the Edmontosaurus.

The Edmontosaurus was no small dinosaur either, just like the Triceratops. Standing 9.8 feet tall at the hips, the Edmontosaurus weighed 4.4 short tons.

If it weren’t the T. Rex that was hunting down the Triceratops, then it would be Velociraptors.

These fast-moving carnivores were a part scavenger, part hunter. They mostly ate creatures smaller than them, but occasionally, the Velociraptor could have eaten Triceratopses, especially scavenged ones.

Triceratops are know for their horns and frill

Could the Triceratops Defend Itself?

Yes, and it likely did.

National Geographic article from 2009 wrote about the findings from a team of experts who reviewed the fossilized skulls of Triceratopses.

According to the findings, Triceratops’ head frill was likely used as a shield to protect its neck. The neck frill encompassed the back of the neck and was partially alone on each side. The bony frill is one of the largest parts of the fossil skull. Interestingly, taken altogether, the Triceratops has the largest skulls found in plant-eating dinosaurs.

As for the horns? Those could have helped the Triceratops fight other dinosaur species. It, too, would be done defensively, as Triceratopses had no reason to hunt dinosaurs when they ate plant matter. The two long horns could stab the attacking theropod dinosaur, and the nose horn of the Triceratops could also be used to impale the aggressive dinosaur.

Interesting Dualities About The Triceratops And Its Diet

The duality between the Triceratops and cycads underscores a particular evolutionary harmony that existed during the late Cretaceous period. On one hand, the Triceratops, a large, herbivorous dinosaur with a distinctively strong beak and dental arrangement, was perfectly equipped to manage the tough, fibrous nature of cycads.

This plant group, which resembles modern palms and ferns, flourished in the Mesozoic era, offering a readily available food source for these creatures. On the other hand, cycads could have benefited from the Triceratops in a mutually advantageous relationship.

As Triceratops feasted on these plants, they may have inadvertently participated in the dispersion of cycad seeds, helping to propagate the species they depended on for food. This interdependency showcases a duality where the biological traits of the Triceratops directly influenced, and were influenced by, the very flora that sustained it.

Another significant duality can be seen in the relationship between gastroliths and the digestive process in Triceratops. Gastroliths served a fundamental purpose in the gastrointestinal system of these ancient animals. While the mastication capabilities of Triceratops were limited—primarily designed to crop and shear plant material—their digestion relied heavily on the internal grinding provided by gastroliths.

These stones, once swallowed, acted much like a modern-day bird’s gizzard stones, helping to break down tough plant fibers for easier absorption and digestion in the Triceratops’ gut.

This duality between ingested stones and digestion highlights an elegant natural solution to dietary challenges faced by large herbivorous dinosaurs, tying together the physical characteristics of the animal with behaviors that facilitated survival in a world of tough, raw vegetation.

Frequently Asked Questions

What Did the Triceratops Dinosaur Eat?

The Triceratops was a herbivore, which means its diet consisted solely of plant material. This three-horned dinosaur is believed to have fed on the tough plants that were available during the late Cretaceous period, approximately 66 million years ago, such as palms, cycads, and ferns. Its beak-like mouth and strong jaw muscles would have been suitable for biting off the fibrous plant material.

Where Can Triceratops Fossils Be Found?

Triceratops fossils have been primarily found in the region that now makes up Western North America. They are particularly abundant in the Hell Creek Formation, Lance Formation, and Scollard Formation, where numerous bones, including many skulls, have been discovered. These regions give us invaluable insight into where this dinosaur lived and roamed during the late Cretaceous period.

How Can We Differentiate the Triceratops from Other Dinosaurs?

The Triceratops is easily distinguishable by its three horns—one on its snout and two above its eyes—and a large bony frill at the back of its head. The genus name “Triceratops” actually comes from the Greek for “three-horned face.” These defining features, along with the fossil evidence, make it one of the most recognizable dinosaurs.

What Are Some Interesting Triceratops Facts?

Some interesting triceratops facts include that they lived during the Maastrichtian stage of the late Cretaceous period, about 66 million years ago. Triceratops were one of the last non-avian dinosaurs before the mass extinction. They could grow up to be 26 to 30 feet long and 10 feet tall, making them one of the largest among terrestrial animals of its time. The fossils also suggest that these dinosaurs likely moved in groups and had complex social behaviors.

How Did the Triceratops Use Its Frill?

The function of the Triceratops’ frill, a distinctive bony skull ornamentation, is still a subject of debate. It may have been used in defensive behavior, as a thermoregulatory device, or as a display structure to recognize members of the same species or compete for mates. The blood vessels present in the frill suggest it could have also played a role in regulating body temperature.

Was the Triceratops Dinosaur Capable of Defending Itself Against Predators?

Yes, the triceratops would have been able to defend itself effectively against predators. Its three horns and strong, muscular neck could easily ram another dinosaur if necessary. The large frill could also have served to protect its neck. Its most formidable natural predator was likely the tyrannosaurus rex, but the Triceratops was well-equipped for defense and could have posed a significant challenge to any would-be attacker.

Did Any Mammal Prey on The Triceratops?

During the time of the Triceratops, mammals were relatively small and most likely unable to hunt a fully grown triceratops due to its massive size and fierce defensive capabilities. Thus, mammals were not considered natural predators of these large herbivorous dinosaurs.

What Evidence Do We Have of Triceratops Behavior?

Evidence of triceratops behavior is gleaned primarily from the fossil record, including numerous triceratops skulls and bones. Bone beds suggest that triceratops may have found in groups, which implies some level of social behavior. Moreover, pathologies found on their skulls suggest head-butting or flank-butting behavior, possibly as part of intraspecific combat or defense against predators.

Could the Triceratops Run Fast to Escape Predators?

The triceratops, measuring between 26 and 30 feet in length and weighing as much as 12 tons, was one of the largest among terrestrial animals of its time. Due to its massive body, it is not believed to have been a fast runner. However, its size and defensive armament, including its horns and frill, may have been its primary defense mechanism rather than speed.

How Do We Know the Triceratops Roamed Western North America?

Scientists have discovered a multitude of Triceratops fossils, particularly triceratops skeletons and skulls, in various geological formations dating to the late Cretaceous period in regions that are now part of Western North America. The significant concentration of these fossils in that area, as well as paleogeographic evidence of the landscape during that era, strongly indicate that triceratops lived in and roamed that particular region of ancient Earth.