Pterano

Pterano, voiced by Michael York, is a character and anti-villain in The Land Before Time film series. He is a Pteranodon, called a "Flyer" in the films and TV series, and is Petrie's long lost uncle. He is related to Petrie on his mother's side, being her brother.

The Land Before Time VII: The Stone of Cold Fire
After reuniting with his sister in the Great Valley, he, along with his sinister henchmen Rinkus (a sly pink Rhamphorhynchus) and Sierra (a hotheaded brown Cearadactylus), began searching for the "Stone of Cold Fire ", a comet which he thought would grant him magic power. Because Ducky had been eavesdropping on their plans, and because they saw her as a useful object in their mission, they kidnapped her during the night, and carried her off into the Mysterious Beyond. Littlefoot and the others followed them, to save Ducky, while Pterano began to gradually realize the mistakes in his actions. He ultimately failed in his mission when it was found out that the stone did not really contain any magical powers, and wound up putting Petrie and the other children in danger. However, he ended up saving them at the end. Rewarding the rescue, Grandpa Longneck and the other adults exiled Pterano to the Mysterious Beyond for a (reduced) period of five cold times (winters/years). Pterano appears to have truly changed his ways, having accepted responsibility for his actions and hoping that he can make up for them once he is allowed to return to the herd.

Prominence
In The Land Before Time X: The Great Longneck Migration a lone Pterosaur somewhat resembling Pterano - albeit skinnier and with different colors - is seen when Littlefoot and his grandparents leave the valley. It was originally rumored that he was going to appear again in The Land Before Time XII: The Great Day of the Flyers, however, the idea was apparently dropped, if ever considered.

The Land Before Time (TV series)
He has also been mentioned multiple times in the TV series by Petrie; once in "The Meadow of Jumping Waters" when he said Pterano told him that whoever ate tickly red treestars would have bad luck, and another time in "The Spooky Nighttime Adventure" when Petrie tells a story about a sharptooth-eating flyer. Petrie tells Cera that Pterano was the one who told him the story in the first place.

Trivia

 * Where or when he met Rinkus and Sierra is unknown.
 * Though many including Littlefoot, Mr. Threehorn, Grandpa Longneck, and even his sister can see through everything he says, his nieces and nephews appear to idolize him, especially Petrie. He brings out the worst in Petrie, getting him to lie to his friends to try and help Pterano get information about the Stone of Cold Fire and also making excuses for Pterano's bad behavior and belittling his friends for not believing Pterano.
 * Pterano is one of the few characters with a musical suite. Other characters that have a musical suite are the Diggers and Hyp and his gang.
 * Pterano is also similar to Cassim from Aladdin 3.
 * Both are family of protagonists. (Pterano: Petrie, Cassim: Aladdin)
 * Both has henchmen, but less sinister and became good.