Height: 10 feet
Weight: 4 tons
- Male: Bright green with bright yellow underbellies and backs, and have a bright red and orange nasal chamber.
- Female and juvenile (both sexes): Like the male, only with a yellow nasal chamber.
Diet: Tough, fibrous vegetation; leaves and tree bark, mostly.
Preferred Habitat: Muttaburrasaurus dislikes conditions that are too hot and humid, and so it prefers to live in the cool mountainous areas of the Southern Highlands or Mountain Ranges. It migrates seasonally from highland areas to lowland areas by following well-used routes, travelling in accordance to temperature. This dinosaur will also bathe in water or mud if the heat becomes too uncomfortable, and it has been seen in the Deep Channel from time to time.
Social Structure: Muttaburrasaurus is a herd animal. Herds usually consist of several females and young, a few males, and a larger, dominant male.
Muttaburrasaurus is a large ornithopod similar to Iguanodon. Like Iguanodon, Muttaburrasaurus has a toothless beak at the front of its jaws with teeth hidden by fleshy cheeks; and a five-fingered hand with three middle fingers for walking, a grasping fifth finger, and a thumb spike.
Despite its similarities with Iguanodon, there are several features which make Muttaburrasaurus unique among its kind. For example, instead of grinding teeth as in Iguanodon, it has sharp, shearing teeth which allow the animal to feed on much tougher vegetation. Muttaburrasaurus also has an enlarged, hollow, upward-bulging muzzle which is covered with a layer of brightly-coloured skin that forms an inflatable sac. This sac expands when the animal calls. Muttaburrasaurus uses its inflatable nasal chamber to amplify its calls while displaying at the same time.
Muttaburrasaurus tends to use its large thumb spike more for foraging rather than for defense; preferring to flee when faced with a predator. The spike is mostly used to scrape bark from trees or to uproot roots and tubers. The spike is also used to scrape against mineral deposits in the mountains, as Muttaburrasaurus is fond of consuming minerals and clays.
When faced with predators Muttaburrasaurus will flee, however it can still be very aggressive if cornered. Its deafening calls and brightly-coloured nasal sac can be intimidating, and like Iguanodon, it will use its powerfully-muscled forearms to drive its thumb spikes deep into the attacker’s flesh; or swipe at a predator with its deep tail.
While capable of walking on all fours, unlike most other hadrosaurs and their relatives Muttaburrasaurus spends almost all of its time on two legs, rarely ever switching to a quadruped gait.