After a long wait I finally found the time and the will to resume my JP series XD
Pachycephalosaurus is a genus of pachycephalosaurid dinosaurs and the largest and most famous member of the Pachycephalosauria. It lived during the Late Cretaceous Period of what is now North America: its remains have been excavated in Montana, South Dakota, and Wyoming.
Pachycephalosaurus is a bipedal herbivore famous for having a large, bony dome atop its skull, up to 25 cm thick which houses its brain. The dome's rear aspect is edged with bony knobs and short bony spikes projected upwards from the snout.
The head is short, and possess large, rounded eye sockets that faced forward, suggesting that the animal has good eyesight and is capable of binocular vision. Pachycephalosaurus has a small muzzle which end in a pointed beak; the teeth are tiny, with leaf-shaped crowns.
Its the largest of the pachycephalosaurid dinosaurs; the adults are about 4.5 metres long and weigh about 450 kilograms . It has a fairly short, thick neck, short fore limbs, a bulky body, long hind legs and a heavy tail, which is held rigid by ossified tendons.
Their skin is mostly brown with dark blue markings and with a white underbelly.
Nine Pachycephalosaurus were created by InGen inside their compound on Isla Sorna; they weren't planned for the initial opening of Jurassic Park on Isla Nublar, and they were transported there only later.
Pachycephalosaurus are social animals with a behavior similar to that of bighorns and musk oxen: the male individuals ram each other headlong, horizontally straighten their head, neck, and body in order to transmit stress during ramming.
Fights are not lethal, but sometimes the specimens report wounds and fractures that require medical treatment, thus requiring greater surveillance for these dinosaurs.
They usually tolerate other species, including humans, and they are on their own unless they're disturbed, in which case they attempt to ram things with their domed skulls, in particular the staff vehicles, for which they show a certain aversion.
Fortunately there have never been victims among the staff by these dinosaurs, but this does not mean that they would not be able to given the opportunity: it is therefore appropriate to try not to instigate the aggression of these animals with sudden or too rapid movements.