A moody, herbivorous dinosaur, the iguanodon moves about equally easily on two legs or four.
A typical adult inguanodon is about 30 feet long and can weigh up to 3000 pounds. It has a blunt-nosed head, strong legs, and a muscular tail, and its forelimbs sport long spikes that it uses to defend itself against predators.
While iguanodons are herbivorous, they possess a notoriously quick temper, switching from placid grazing to enraged attacking in the blink of an eye. They typically inhabit dense forests and swamps where vegetation is plentiful, moving in small herds of up to six in search of food.