Height: 9.5 feet (2.9 meters)

Length: 26 feet (7.9 meters)

Weight: 14,000 pounds (6,350 kg)

Period: Late Cretaceous

Found in Montana, South Dakota, Colorado, Wyoming, and Canada, Triceratops was the largest, heaviest, most common and best-known ceratopsian. Sixteen species have been assigned to Triceratops, although some scientists believe that only one species exists, and that the variations found between ceratopsian horns are similar to those found in modern horned animals such as cows. Its massive head had a deep, narrow, parrot-like beak with brow horns 3 feet (0.9 meters) long, and its frill could reach widths of 7 feet (2.5 meters).

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Dinosaur pictures by Joe Tucciarone, http://members.aol.com/Dinoplanet/dinosaur.html, used by permission.