BEWARE BOIÚNA: AN AMAZONIAN PREDATOR
Rebecca Briggs | September 22, 2022
Beware Boiúna is a 2026 survival horror film which follows a group of individuals on a medical mission in the Amazon, only to have their mission transformed into a fight to survive. This film was directed by Mike P. Nelson and stars Jessica Rothe, Kiana Madeira, and Logan Marshall-Green.
According to an article written by Jordan M Tyler for Bloody Disgusting, the main threat of the film is Boiúna. Boiúna is an ancient Amazonian predator said to be the size of a T. Rex. As the medical team heads into the jungle, they begin to alter the teaming environment which catches the attention of the predator.
On October 2, 2026, Lions Gate released Beware Boiúna in theaters. The film has a run time of 1 hour and 44 minutes and is written to incorporate elements of the horror, action, adventure and survival thriller genres.
Medical Mission Turned Nightmare
The story begins with a team of doctors traveling to the Amazon to perform a series of medical missions. Three of the main characters, Alli (Jessica Rothe) and Brennan Malloy (Logan Marshall-Green) and Lena (Kiana Madeira) are part of the team which embark on this mission. They alter quickly alter the environment around them, and soon their journey become increasingly more dangerous.
Lena is used to working around the river, and she knows the area well. She is searching for her missing brother, and she becomes vital to the team once they realize they are dealing with a being greater than your average predator.
Beware Boiúna uses the un-chartered territory of the Amazon as a threatening character itself. The environment of the rainforest becomes just as threatening as the giant predator which the team must face. There are m oney ways out and surrounding v threatn living conditions which only add to the threat level. Thick vegetation only serves to further obstruct the team’s line of sight. They are in a hostile territory with no escape.
She is described as a gigantic, ancient predator.
Lionsgate’s synopsis describes Boiúna awakening to reclaim her domain when the medical mission enters the Amazon. Boiúna portrays the creature as something more than a random monster, as it helps to show the balance in the ecosystem.
In the production material, Lena refers to Boiúna as the “mother of the waters.” Boiúna is restful as long as balance is maintained, but reactive when that balance is disrupted, Lena states.
It gives an environmental message to the film.
It’s not simply about trying to evade a enormous predator. The characters are going into a place (the Amazon) where humans have very little command. Their presence may be one of the many reasons the threat has awakened.
For people looking for this movie on an entertainment app (for example Pikashow), the official release of the movie is through Lionsgate (in the theaters).
The other two main characters of this movie Jessica Rothe and Kiana Madeira are both experienced in the horror genre.
Rothe plays Alli (a doctor involved in the mission) and Madeira plays Lena, who is searching the jungle for her missing brother and dealing with the threat Boiúna presents.
Brennan Malloy is played by Logan Marshall-Green. The supporting cast includes Will Close as Callum, Jackson Bews as Shawn, Juan Pablo Shuk as Miguel, Sergio Herrera as Jorge, Mateo Moreno as Diego, Vicente Peña as Pedro, and Nelson Camayo as Guilherme.
This kind of structure is usually seen in survival films, so each character has different levels of knowledge and motivation, and brings that with them into a dangerous situation.
Some characters understand the jungle better, but when Boiúna starts hunting, no one can depend on normal ways of surviving.
Mike P. Nelson directed Beware Boiúna from a screenplay credited to Alan B. McElroy, Tony Giglio, and Nelson.
Production took place in Colombia and a lot of the movie was shot in the rainforest and near rivers. The Minneapolis College of Art and Design notes that Nelson and his crew worked in the Amazon rainforest and surrounding waterways.
That location work creates a more physical sense of scale for the film.
The filmmakers also used various techniques to help the actors make believable reactions to the creature. IMDb states that production used methods such as dragging heavy equipment to help illustrate the movement and weight of the gigantic snake to the actors.
This helped integrate the finished creature into its environment.
The creature also has a backstory based in the folklore of the Amazon region.
The name Boiúna comes from traditions in that region of the world.
Although some elements of the film’s mythology are based on the story of the boiúna, Boiúna shouldn’t be regarded as a representation of folklore, and more specifically a documentary about Indigenous or Brazilian Folklore.
Legends can change a lot from one community to another, and even with the same community, there can be many variations depending on the individual who is telling the legend.
In the movie, Boiúna is a force that is related to the water and jungle. So with the presence of a creature like this, it can break the balance of the ecosystem, and bring an element of the monster movie to the story. Humanity, in this case, is brought to an unknown ecosystem.
For people who find this movie through a search like Pika Show, one of the main differences that separate this movie from a simple monster thriller is the presence of elements inspired by the folklore of the continent.
Beware Boiúna Opens October 2
Limited U.S. release horror, Beware Boiúna, opened on October 2, 2026. Lionsgate distributed the film which runs for 104 minutes and has an R rating for violent content, disturbing images and language.
The confirmed principal cast includes Logan Marshall-Green, Kiana Madeira and Jessica Rothe, with Mike P. Nelson directing.
The basic story begins with a medical mission that goes to the Amazon to find and deliver a rare medical specimen. While there, they awaken an ancient predator and must figure out how to survive.
What gives the movie a more distinctive identity is the way it infuses the threat of the environment with the threat of the creature. Boiúna is not something that waits to attack people. The creature of the film represents the jungle and the power of nature, which is ultimately greater than the people who invade it. The survival element, unpredictable and difficult-to-control nature of the jungle is symbolized by the creature of the film.
Adding to the appeal, the film incorporates the mythology, horror and wilds of the Amazon along with a creature-feature element to provide horror fans a movie set in the jungle to help satisfy the anticipation for other major releases in October 2026.
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