Pterodactyls

The Pterodactyls are a group of nasty scavengers hailing from various species of pterosaur, all named after a storm aspect. They are major antagonists of the Disney/Pixar film The Good Dinosaur.

Official Bio

 * The Pterodactyls are a search-and-"rescue" team of five. They like to sit back and let the often-treacherous storms in this part of the world do their dirty work, then reap the benefits of the devastation. But when these flying hunter-scavengers set their sights on Spot and Arlo, they’re in for a big surprise.

Thunderclap
Thunderclap is the leader of the gang, a purple Nyctosaurus. While all of them work together for for food, he asserts his position over the others when they fight over prey.

Role in the film
After an Apatosaurus named Arlo is stranded far away from his home, the Pterosaurs encounter him while looking for prey following a deadly storm. Thunderclap introduces themselves under the claim that they are a rescue patrol and agree to help him find his way back. However, they quickly reveal their carnivorous nature, and detect that Arlo has something accompanying him and pressure him into revealing where his acquaintance is. While Arlo tricks Downpour and Coldfront to look for it, Arlo escapes with his human Spot and runs from the pterosaurs. The Pterodactyls are hot on their trail until they run into two young Tyrannosaurs, who scare the group away.

When the two return to the mountains, the Pterodactyls encircle them like sharks and attack Arlo, managing to kidnap Spot and push Arlo off a cliff while he is distracted. Spot escapes their grasp briefly and hides inside a stump at the river while the pterosaurs try to claw him out. Arlo arrives and hits two of them into the water where they ride helplessly downstream. With only Thunderclap left at the stump, Spot attacks him and ears a hole inside his wing, rendering Thunderclap flightless as he crashes into the river.