Petrie is a pterosaur, and is also called a flyer, (a Pteranodon to be exact) and is the third friend of Littlefoot in The Land Before Time film series. Petrie has a family, which are a mom (voiced by Tress MacNeille) and a bunch of brothers and sisters. He was originally afraid of flying until a tangle with the Original Sharptooth gave him the courage (and breath) to save his friends. He seems to idolize his Uncle Pterano, thinking he can do no wrong. He seems to have a strong relationship with Ducky.