Character mistake: The Predator is jumping through trees, then landing in a creek, splashing in the water. Its cloak barely flashes for a moment, then it can walk through the water still cloaked. This is a prequel to the other Predator movies, where it is already established that with their cloaking technology, even in the future, walking in water or getting wet disrupts the cloak and it malfunctions. (00:37:10)
Suggested correction: Even though Prey takes place 300 years before the original movie, its technology isn't necessarily "worse"; it's just different. In the 1987 film, the "Jungle Hunter" has a blue-tinted cloak that shorts out in the river. In Prey, the Feral Predator has a reddish/orange-tinted cloak. Fans suggest the red cloak might be an older, more robust (but perhaps less "clean" looking) version of the technology that wasn't yet sensitive to moisture but lacked the optical clarity of the later models.
While that is a plausible explanation, without concrete proof or a given explanation in the film or subsequent adjacent material, it still leaves it as an inconsistency in the movies. With all the other tech and weapons this predator has, being more primitive, and their species and culture taking any advantage they can in a hunt, it also doesn't make sense for them to use a cloak in the future with "more advanced tech" that is weak to water, when Earth is covered in water and it rains.
Factual error: Early in the movie, the Predator is standing still while cloaked as an ant crawls across its leg. A rat grabs and eats the ant, then a snake strikes the rat. The snake starts to crawl away, then suddenly senses the Predator and gets startled, rattling its tail. However, rattlesnakes are pit vipers. They see heat. So even cloaked, the snake should have already seen the Predator standing there and known. Predator cloaks do not cloak from heat vision. (00:13:30)
Suggested correction: If you watch closely, the rattlesnake is initially distracted by a mouse. However, as the predator moves closer (even while cloaked), the snake becomes agitated and rears up in a defensive "S" posture. The reason the snake doesn't strike immediately isn't necessarily that the predator is hidden from its heat vision; it's that the predator is a giant, unfamiliar heat source that isn't moving aggressively yet. The snake is essentially "sizing up" a massive predator it can see perfectly well.
That is not how pit vipers behave. Unless the predator would be behind glass, it would be aware of body heat coming from it, and as a larger source than that rat, it would be defensive. It is in captivity where the feeding response can override this, as seen by handlers. But not in the wild, where the snake would not be used to a large heat source providing food.
Factual error: The movie is set in the Northern Great Plains of the United States, and the tribe is identified as Comanche, but the Comanche were located in the Southern Great Plains, across present-day northwestern Texas, eastern New Mexico, southeastern Colorado, southwestern Kansas, and western Oklahoma.
Plot hole: The way Naru defeats the Predator at the end is extremely contrived and unrealistic. For one, she figured out how the laser-guided bolt gun worked just by seeing the bolt follow the laser one time before. She somehow knew not only exactly where the Predator would be in the mud, but where he would stand and have the laser aimed exactly at his head. And somehow the laser turned on exactly when she needed it to. And also, the Predator had several seconds to duck once he realised. It should not work. (01:26:40)
