Beware Boiúna (2026) Review – A Giant Snake Movie With Real Bite

It was a most welcome change to see a giant snake movie that remembered to take itself seriously for once. With Anaconda recently embracing the comedy genre with Paul Rudd and Jack Black, Beware Boiúna takes the opposite approach, going for a more traditional creature feature. There aren’t any wink and nods to the audience, and instead it delivers on pure survival thrills, and it did so in a way that I enjoyed greatly.

Written by Alan McElroy and directed by Mike P. Nelson, Beware Boiúna has a medical team venturing into the Amazon rainforest to provide health care to the local tribes.

Unfortunately for them, the forest is hiding something more dangerous than the poachers, illegal miners, and loggers who are invading the land. An ancient giant snake called Boiúna is stalking the forest, a protector?, a killer snake with no purpose? Or a centuries old godessss?

Who knows!?

That’s probably what I enjoyed most about Beware Boiúna. The snake itself is more of an ancient deity in this movie rather than just another giant reptile with proportions far bigger than nature allows. It reminded me of Godzilla in the sense that Boiúna is a guardian of her territory, and I think Mike P. Nelson did a fantastic job not using the creature too often, showing her only when she’s about to attack or already attacking, making the viewer constantly anticipate the beast showing up. Very much like Godzilla (2014).

There were plenty of scenes where she could have been shown in full, but her appearance was always saved for a better moment.

My personal favorite was when Lena (Kiana Madeira) found herself submerged under thick mud when Boiúna got impossibly close to her. I knew it was going to be a good scene based on the trailer, but the execution was even better than expected, and with Lena covered in thick mud I couldn’t help but think of the movie Predator and how she was practically invisible to Boiúna.

Whether it was intended or not, it worked, and that’s probably because the movie doesn’t use CGI to make the creature look better. It wasn’t needed; other shots made the snake look tangible, and the rest of the movie’s practical effects were used in ways that made the creature feel real.

Speaking of which, Beware Boiúna doesn’t have the bloodbath feel that many giant monster movies tend to have nowadays. People are tossed away, crushed, and eaten, but there isn’t the grotesque, drawn-out gore that could have taken away from the tension and atmosphere that Mike P. Nelson wanted to achieve.

I think it was the right decision to not go that route because it would’ve cheapened the movie’s feel, and it’s not the first time it happened. However, not only the practical effects contributed to the movie’s feel; the unpredictability of the movie’s events was a pleasant surprise as well.

It was hard to tell who would make it out of the forest, and while certain characters had their chances at surviving and escaping, none of them actually had the guaranteed survival. It added a lot of weight to every encounter, especially since the rules of this particular giant snake movie weren’t set in stone.

Speaking of which, Logan Marshall-Green was another pleasant surprise for me. The man has been in TV shows I’ve enjoyed, namely The O.C., and more recently in Marshals. He delivered a great performance as Brennan, a character not designed to be overly heroic but instead just average in terms of personality. He is the every man, he isn’t an ex seal or hero, he is the average dude you meet at the bar or the store.

Brennan is introduced as charming, a bit mischievous before a tragic event defines his personality for a while in the movie, but he was still a good survivor, and it seems like Logan Marshall-Green understood what the role asked for and gave us the solid performance we knew he would deliver

I also enjoyed Kiana Madeira as well, and the more the movie went on, the more important Lena’s role became and her character arc developed. It was her character that actually had the connection to the jungle and mythos at hand. She also got her kickass Ripley moment at the end.

I also want to discuss the mythology behind Boiúna herself, briefly. I think it’s nicely showcased how the creature isn’t evil per se, only defending her territory from invaders.

The movie doesn’t go into much detail on that, but it seemed enough that Boiúna wanted to spare Lena at the end.

The finale is where the mythology surrounding Boiúna really clicked for me. Without completely spelling everything out, there is a sense that this creature isn’t killing indiscriminately. Boiúna appears capable of deciding who belongs in this world and who doesn’t.

My interpretation was that she recognises something in Lena — perhaps that Lena belongs there or could ultimately become a protector of the jungle herself. Against the backdrop of illegal mining, logging and poaching, that gives Boiúna a purpose beyond simply being the monster of the movie. This is her domain, and humanity is invading it..

The Amazon rainforest is a pretty wonderful place, and it’s a shame it’s not as common to see such scenery in movies as it should be. I think the setting, the rivers, and the dense woods contribute to the movie’s atmosphere in a way that makes it feel special. It almost made me want to visit the place myself, and it’s not like I wasn’t a fan of giant snake movies before.

The end credits are also worth seeing, as it goes into slightly more detail on the exploitation occurring in the forest, and shows off more of the wildlife while also giving the viewer more of Boiúna doing what giant snakes do best. It was enough of a hint that there might be a sequel in the works, and I wouldn’t be opposed to it at all.

Mike P. Nelson is having such a fantastic year, Silent Night, Deadly Night and Sweet Revenge were great movies either. He’s quickly becoming one of those directors that I keep an eye out for, and it’s also worth noting that the screenplay was written with Alan McElroy, the writer behind Halloween 4: The Return of Michael Myers and Wrong Turn, among other notable movies.

Me, I love giant snake movies, and while I didn’t know what to expect from Beware Boiúna, it was a most welcome change to see a movie in this niche genre that was so good.

It had the atmosphere, the unpredictability, and the sheer spectacle of a giant monster movie, while also remembering to be scary when it had to be.

In short, it was a giant snake movie done right.
A giant snake movie that manages to deliver on the scares.