added by glelsey
Source: WallpapersXL.com
A reference chart of extinct creatures.
This 恐竜 壁紙 contains triceratops. There might also be インドサイ, インディアンサイ, and サイ（rhinoceros unicornis）.
Pachycephalosaurs were among some of the last Dinosaur groups to appear. They lived 75-65 mya.
They are named after one of the best-known members of the group, Pachycephalosaurus.
Pachycephalosaurus means "thick-headed reptile," due to the domed and hugely thickened bone on the 上, ページのトップへ of its skull--like a cyclist's crash helmet.
About 15 feet long from nose to tail, Pachycephalosaurus lived in Montana, South Dakota, and Wyoming.
Stegoceras, which also lived in North America, was about 8 feet long, with a body the size of a goat.
Homalocephale was about 10 feet long and had a flatter skull. It lived in East Asia.
Pachycephalosaurs may have defended themselves によって loweringtheir heads and charging at their enemies.
At breeding time, the males may have engaged in head-butting contests, as some 羊 and goats do today.
They are named after one of the best-known members of the group, Pachycephalosaurus.
Pachycephalosaurus means "thick-headed reptile," due to the domed and hugely thickened bone on the 上, ページのトップへ of its skull--like a cyclist's crash helmet.
About 15 feet long from nose to tail, Pachycephalosaurus lived in Montana, South Dakota, and Wyoming.
Stegoceras, which also lived in North America, was about 8 feet long, with a body the size of a goat.
Homalocephale was about 10 feet long and had a flatter skull. It lived in East Asia.
Pachycephalosaurs may have defended themselves によって loweringtheir heads and charging at their enemies.
At breeding time, the males may have engaged in head-butting contests, as some 羊 and goats do today.
