She is a bonker dinosaur.  She bonks the other dinosaurs with her hard skull. It has solid bone capable of handling heavy bashing from rival dinos.  The Pachycephalosaurus used its tail for balance.

Lets stand back and watch them bonk heads. Charging full speed ahead with their heads down, it is a mightly clash of skulls vibrating around the forest.  Even the little ones stay out of the way. The 25cm of solid bone make a loud crash around the valley, making even the largest dinosaurs take notice.

Watch out for the fierce dinosaurs, they can eat the bonkers at any time!!!.  Found in North America the Pachycephalosaurus were thought to be social animals like our common mountain goats.

Watch out, don't stay in your car because the bonker, may headbutt your car, pushing it over the cliff down in the the valley towards the river, your car ending up in a fireball.

Watch out, we do not have a thick skull like the Pachycephalosaurs, don't challenge her to a duel, because you will come out second best.