Petrie is a boy.
Petrie, a Pteranodon character in The Land Before Time series, is consistently depicted and voiced as male. The original short answer confirms that Petrie is a brown male Pteranodon. This is further solidified by the actors who have voiced him over the years, Will Ryan and Jeff Bennett, both male voice actors. Therefore, based on the provided information and the consistent portrayal within the animated series, Petrie is undoubtedly male.
