Land Before Time (Ptero)

Ptero is the guest character in The Land Before Time XV: The Sharp Beak Prince. He is half-Sharptooth and half-Leaf Eater, being the son of a Pteranodon longiceps (Flyer) and a Pterodactylus kochi (Sharp Beak).

His father Sydo, a Flyer, was kicked out of his herd after they found out that he'd proposed to Agatha, the leader of a pack of Sharp Beaks. Sydo had lived peacefully with the pack for years and he and his mate had agreed to let Ptero decide if he was going to live as a herbivore or a carnivore. However, as time passed, Sydo noticed with alarm that Agatha was trying to force Ptero to be a Sharptooth, as she didn't want the leadership to fall out of her family, where it had been for generations, as Ptero was her firstborn and only child. Eventually tiring of Agatha's controlling ways, Sydo planned to flee with Ptero. However, Ptero inadvertently let Agatha know of Sydo's plan, so she lured her mate into a trap and murdered him. However, Ptero heard his last cry for help and arrived at the scene shortly after she'd eaten Sydo's body.

Being forced to alibi that Sydo had run off on them, Agatha feigned that Sydo's old herd had come and murdered him for marrying a Sharptooth. The pack and Ptero believed Agatha's lie and hunted down and killed Sydo's old herd, giving the pack a fearsome reputation.

Because Ptero mistakenly believed that his father was a Sharptooth and was killed by Leaf Eaters because of what he was, Ptero came to hate herbivores and gladly accepted the lifestyle of eating Leaf Eaters, though he was still uneasy about hunting and only did it because Agatha made him.