The films follow the friendship of a group of young reptiles (four dinosaurs and a pterosaur) named Littlefoot (a male Apatosaurus), Cera (a female Triceratops), Ducky (a female Saurolophus), Petrie (a male Pteranodon), and Spike (a male Stegosaurus). After finding the Great Valley, they raise a carnivorous baby (a male Tyrannosaurus whom they name Chomper), survive a drought, a cold snap, and witness a solar eclipse. Throughout the films they embark on adventures, learning lessons about life, teamwork, and friendship along the way.