Vtech 80-122400 Switch & Go Dinos - Horns the Triceratops, Ages 3-8

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Reid, R.E.H. (1997). "Histology of bones and teeth". In Currie, P. J.; Padian, K. (eds.). Encyclopedia of Dinosaurs. San Diego, CA.: Academic Press. pp.329–339.

Ott, C.J.; Larson, P.L. (2010). "A New, Small Ceratopsian Dinosaur from the Latest Cretaceous Hell Creek Formation, Northwest South Dakota, United States: A Preliminary Description". In Ryan, M.J.; Chinnery-Allgeier, B.J.; Eberth, D.A. (eds.). New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. Bloomington: Indiana University Press. p.656. Davitashvili, L. Sh. (1961). Teoriya Polovogo Otbora (Theory of Sexual Selection). Izdatel'stvo Akademii nauk SSSR. p.538. Triceratops were 9 metres (30 feet) in length and weighed 5 tons. The bigger males would have weighed almost as much as a Tyrannosaurus.Cope, E.D. (1872). "On the existence of Dinosauria in the Transition Beds of Wyoming". Proceedings of the American Philosophical Society. 12: 481–483.

Like all chasmosaurines, Triceratops had a large skull relative to its body size, among the largest of all land animals. The largest-known skull, specimen MWC 7584 (formerly BYU 12183), is estimated to have been 2.5 meters (8.2ft) in length when complete [29] and could reach almost a third of the length of the entire animal. [30]In movies and television, Triceratops are typically portrayed as herding animals, much like American bison or Hippopotamus. In reality, there is no evidence to suggest, or to reject, this notion. Groups of fossils have been found, but it is unknown whether these were family groups or some other social group.