Beware Boiúna 2026 Movie Review Trailer Poster

From *Cannibal Holocaust* to *Anaconda* and *The Green Inferno*, genre cinema has maintained a highly fraught relationship with the Amazon rainforest. While *Beware Boiúna*’s portrayal of the South American jungle and its indigenous peoples is not without stereotypes, this fast-paced creature feature directed by Mike P. Nelson surprises—both through its attunement to the rhythms of the environment and its complete lack of interest in condescendingly exorcising white guilt.

After an opening sequence that sets the stage—showing Amazonian indigenous people confronting illegal gold miners—the film introduces us to the passengers of a boat drifting leisurely along the mighty Amazon: a humanitarian team led by Dr. Miguel (Juan Pablo Shuk) and accompanied by rookie doctors Alli (Jessica Rothe) and Callum (Will Close), who have traveled to the region to provide medical care to underserved populations. When the group crosses paths with Brendan Malloy (Logan Marshall-Green) and his band of unscrupulous adventurers, they awaken the serpent that gives the film its title: a guardian of nature that decides who lives and who dies with a flash of its fangs.

Director: Mike P. Nelson
Writers: Tony Giglio, Alan B. McElroy, Mike P. Nelson
Stars: Logan Marshall-Green, Jessica Rothe, Kiana Madeira

Shot on location in Leticia and Girardot, Colombia, *Beware Boiúna* benefits from taking its time to get going. Nelson and cinematographer Nick Junkersfeld clearly aim to immerse themselves in the sights and textures of the Amazon. From the boat’s helm cutting through dark waters and sunlight playing across the actors' faces to the condensation on glasses of Colombian liquor, the atmosphere of *Beware Boiúna* feels dense, authentic, and free of digital artifice.

As for the Boiúna itself, its grand entrance is both imposing and terrifying. The snake remains effectively hidden for so long that, when we finally see it clearly, it is evident that—within the category of cinematic giant snakes—it is undoubtedly one of the most impressive. Although there are moments when erratic handheld camerawork turns the action from intentional chaos into incoherent visual noise, the film manages to keep the viewer gripped with overwhelming intensity for the majority of its runtime. 

*Beware Boiúna* strives to break away from the exoticizing and alienating gaze common in many Amazon-set films made by non-Indigenous creators, featuring a significant presence of Colombians both in front of and behind the camera. While the screenplay—penned by Nelson, Tony Giglio, and Alan B. McElroy—draws inspiration from regional folklore, specifically the legend of the Boiúna or "Black Snake," certain elements regarding the boat's mechanics, the character of Lena (Kiana Madeira)—who takes center stage as the film races toward its climax—and her tribal heritage smack of typical Hollywood invention.

Even so, *Beware Boiúna* strikes a fine balance between delivering edge-of-your-seat thrills and critiquing white interference in the Global South. From the film's perspective, we must respect nature's wisdom—however cruel it may be; otherwise, the Boiúna could turn us all into twisted heaps of human flesh.

Watch Beware Boiúna 2026 Movie Trailer