Pachycephalosaurus

Pachycephalosaurus (meaning "thick headed lizard,") are neutral mobs based on the real-life dinosaur species Pachycephalosaurus wyomingensis, but larger than their Mesozoic counterparts. Like all other prehistoric reptiles of the mod, they do not spawn naturally in the world.

Appearance
Pachycephalosaurus is a large dinosaur that has a large, bony dome atop its skull. The dome's rear aspect was edged with bony knobs and short bones. If kept in captivity, their pen must be in iron bars or stronger, or else they will break the blocks that they are encaged in. It has three subspecies
 * The pumpkin subspecies can hatch in all biomes except forest, tundra and taiga. It has an orange body and a black underbelly.
 * The white subspecies can hatch only in tundra and taiga biomes. It has a white body and a black underbelly.
 * The lime green subspecies can hatch only in forest biomes. It has a green body and a slightly lighter underbelly.

Behaviour
Pachycephalosaurus has a behavior similar to mobs like pigs and cows, except that unlike them, they eat the leaves of trees and ancient ferns when they are hungry. When attacked, they fight back with their bony skulls, dealing damage and knocking the player back. They also can break any block weaker than iron.

Taming, ordering and feeding
Pachycephalosaurus are tamable dinosaurs and can be tamed in the same way that all other tameable prehistoric reptiles. If the egg comes from a mating between two tamed Pachycephalosaurus, the hatchling will be already tamed. If not, the player need to stay in a range about 6 blocks of the egg, and the hatchling will be tamed. It can be ordered with the order drum by right-clicking it, or ordered without the drum with right-clicking the Pachycephalosaurus with a stick. Pachycephalosaurus use feeders and see them within 6 blocks. They will come for it before searching for ancient ferns or leaves. There is another way to feed them: right-clicking a Pachycephalosaurus with apples, wheat, bread, melon slices, and carrots works too.

Breeding
Pachycephalosaurus breed every 5 minutes. The breeding probability is handled by how many individuals nearby. As mentioned above, the offspring of tamed Pachycephalosaurus is always tamed.