Deep in the Amazon, a humanitarian medical crew travels the river, stopping at small villages to deliver supplies and care. But not everybody — or everything — is happy to see them. Their arrival draws the attention of Boiúna, a colossal ancient serpent who awakens to reclaim her domain.
Directed by Mike P. Nelson from a screenplay by Alan B. McElroy, it stars Kiana Madeira (Fear Street), Jessica Rothe and Logan Marshall-Green, and was shot deep in the Amazon with an emphasis on practical effects. Our verdict: a gritty, well-acted creature feature that earns its carnage — if you can handle the shaky camera and the wait.
The Movie Before the Movie
The film’s smartest decision is also its riskiest. Like Disturbia, which spends its first hour as a teen drama before its killer-next-door premise kicks in, Beware Boiúna has to work as a story before it delivers what you paid to see.
It does. The two medics just want to help, bringing medicine to a region that badly needs it. When Logan Marshall-Green’s character arrives with his men — there for far less noble reasons — the two groups become dangerously entangled, and that human conflict is compelling on its own. By the time the snake truly takes centre stage in the second half, you’re invested.
Strong Performances, Led by Kiana Madeira
When She Arrives, She Arrives
When Boiúna finally takes over, she’s a massive presence, literally and figuratively, and the film delivers plenty of fun, brutal attack sequences. The gore is great, and the practical-leaning approach means the effects rarely take you out of the moment. It’s the kind of B-movie premise made at A-movie quality, in the same vein as the Idris Elba lion thriller Beast.
For creature-feature fans who grew up on Anaconda, it’s a genuine contender. Our critic went as far as calling it a challenger to the original Anaconda as the best giant snake movie ever made — a crowded genre, but one that rarely gets this kind of budget and care.
The Problems
Things to Know
The Good, The Bad, & The Ugly
| The Good | The Bad | The Ugly |
|---|---|---|
| A Story Worth Caring AboutThe first half works as a tense human drama, so the snake attacks carry real weight when they arrive. | The Snake Arrives LateCome purely for creature carnage and the first half will test your patience. | Shaky, Hard-to-Read ActionMostly handheld and in tight close-up — the kills can be hard to follow, and tough on motion-sensitive viewers. |
| Kiana MadeiraA standout lead with real motivation and terrific physical performance. | A Heavy-Handed ScoreCritics noted music that surges every time the snake appears. | A Deeply Split Reception56% from critics, 1.5/4 from RogerEbert.com — and raves from creature-feature fans. |
| Gritty, Practical GoreGreat kills and effects that rarely take you out of the film. | One Unearned TurnA late heroic choice that doesn’t quite feel earned. | — |
| A B-Movie Made at A-LevelOne of the best-made giant snake movies in years. | — | — |
The Verdict
Beware Boiúna is a creature feature that respects its audience enough to make you care first and scare later. Its human story is genuinely engaging, Kiana Madeira gives a star-making turn, and when the giant snake finally arrives, she delivers exactly the gory, popcorn-chomping thrills you came for.
Its handheld style and patient build won’t suit everyone — and the sharply divided reviews show it. But for horror fans who want a fun, gritty palate cleanser this Halloween season, it does exactly what it says on the back of the VHS box, and a little more.
The honest read: a must for creature-feature fans and Anaconda devotees — just sit a few rows back. Everyone else should decide whether a slow-burn survival thriller with a monster in its back half is their kind of night at the movies.
For more reviews, check out our full reviews section.
Score Breakdown
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