Ornithopoda

Ornithopoda is a clade of mostly herbivorous ornithischian dinosaurs, ranging from small bipeds to large iguanodontians and duck-billed hadrosaurs.

Ornithischia: Ornithischia is the dinosaur clade whose members had a predentary bone and a pelvis with a backward-pointing pubis. Ornithopoda is one of the principal branches within this larger dinosaur clade.
Dinosaur chewing: Dinosaur chewing includes jaw movements and tooth contact that break food into smaller pieces. Ornithopod jaws and teeth evolved to process plant material efficiently.
Hypsilophodon: Hypsilophodon is a small, agile ornithopod dinosaur known from Early Cretaceous deposits in England. It exemplifies the small-bodied, bipedal end of ornithopod diversity.
Heterodontosaurus: Heterodontosaurus is a small Early Jurassic ornithischian dinosaur with distinct types of teeth. Its early age and anatomy offer context for the origins of ornithopod-like forms.
Hadrosaur migration: Hadrosaur migration is the proposed seasonal movement of hadrosaur populations between regions. Ornithopod trackways and fossil distributions inform debate about movement across landscapes.
Dinosauria: Dinosauria is the clade of reptiles that includes birds and their extinct non-avian relatives. This broader clade places ornithopods within dinosaur evolutionary history.
Dental battery: A dental battery is a tightly packed set of teeth that wear and replace one another as a grinding surface. Hadrosaur ornithopods used dental batteries to grind tough vegetation.
Iguanodon: Iguanodon is a large herbivorous ornithopod dinosaur from the Early Cretaceous of Europe. Its anatomy illustrates the larger iguanodontian branch outside the hadrosaurs.
Lesothosaurus: Lesothosaurus is a small Early Jurassic ornithischian dinosaur known from southern Africa. It provides a glimpse of early ornithischian anatomy near the evolutionary background of ornithopods.
Dinosaur trackway: A dinosaur trackway is a sequence of fossilized footprints made by one or more dinosaurs. Ornithopod trackways preserve evidence of gait, group movement, and habitat use.

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