Maiasaura
- Pronunciation: mah-ee-ah-SAWR-uh
- Translation: Good Mother Lizard
- Order: Ornithischia
- Suborder: Ornithopoda
- Infraorder: Iguanodontia
- Family: Hadrosauridae
- Height: 15 feet (4.6 meters)
- Length: 30 feet (9.1 meters)
- Period: Late Cretaceous
- Description: Herbivore, Bipedal, semi Quadrupedal
- Notes: It was the discovery of a hadrosaur crèche in Montana thatprovided evidence of nurturing behavior in dinosaurs. Remains of Maiasaura nestlings revealed worn teeth, which suggests that they were fed by their parents until they were able to leave the nest.In addition, broken shells in the bottom of the nests were in suchsmall pieces that the dinosaurs who hatched from them must havestayed to walk and lie on the pieces until they were broken in verysmall fragments. These facts among others led to a revision of ourview of dinosaur behavior.