Source: Bestiary, pg(s). 86
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The triceratops is a massive armoured dinosaur. It has three horns in its head, and its neck is protected by a bony crest. They are typically found in small herds of up to eight creatures.
They eat plants but are particularly stubborn and irritable. When threatened, their natural instinct is to charge their opponent, thereby making best use of their sharp horns.
A typical specimen is 30 feet long and weighs 20,000 pounds.
- Triceratops (extinct real-world animal) on Wikipedia