1) Maiasaurs were herbivorous. Adults weighed roughly 3-4 tons. They probably ate about 200 lb. of food each day.
2) Many Maiasaura nests have been found at two sites, Egg Mountain and Egg Island. At the time of the dinosaurs, each of these sites was an island. Although islands are rather limiting in space, the nests are usually found 25-30 feet apart.
4) large numbers of bones found at one location in Montana indicate that there existed a herd of maiasaurs of nearly 10,000 individuals. These individuals varied in size from 9' to 25' in length.
5) the dinosaur nests at both of the Egg Mountain locations have been found at three different depths. Several layers of sandstone were deposited between the nesting horizons.
6) The bones of most newborn birds are not fully ossified (hardened into bone). The ends are still relatively soft and spongy and made of cartilage. As a result, newborn birds can stand up only momentarily. Their bones will not support them.
7) An adult Maiasaura reached a size of 25-30 feet in length. It weighed 3-4 tons.
8) The shells found in the nests of the Maiasaura are all broken up.
9) The front teeth of many dinosaurs like Maiasaura are very interesting. There is a heavy enamel layer on the outside of the upper teeth, but that very same layer is on the inside of the lower teeth. Therefore as the teeth come together, a self-sharpening effect takes place. The teeth become like chisels.
10) The shells found in the nests of Orodromeus are not all broken up. The lower egg shell is usually intact.
11) The presence of large numbers of bones at one site suggest that maiasaurs were found in herds up to 10,000 in number.
12) the bones of the hatchlings of Maiasaura are not fully ossified. The ends are still relatively soft and spongy and cartilaginous.
13) Examination of the embryos of Maiasaura show wears on the front teeth. This has occurred before hatching.
14) at birth, maiasaurs is about 12 inches in length. Bones have been found in the nests of maiasaurs that were over 3 feet in length. This is very common.
15) the bones of the hatchlings of Orodromeus are fully ossified. That means that the ends of the bones are fully developed and very strong.