Once upon a time a Carnotaurus went through the nesting grounds, almost stepping on Aladar's egg.
Citipati took the egg got into a fight and lost the egg to the river.
Every day the egg moves across the water getting farther away from the nesting grounds where he was taken.
But, one day a pterodactyl swooped into the water snatched the egg to feed to her babies a couple other pterosaurs attacked her and she dropped the egg on an island.
Because of that a Darwinius mother found and raised an iguanodan named Aladar.
They joined a herd that were going toward the nesting grounds.
After getting around a Carnotaurus everyone except the herd's two leaders made it to the nesting grounds and lived happily ever after