Colares 1977: The UFO 'Attack' Brazil's Air Force Officially Investigated (Operação Prato)

Most UFO cases are a story without a state — witnesses on one side, a government shrug on the other. Colares is the opposite. In 1977, on a small island in the mouth of the Amazon, so many people reported being hurt by lights in the sky that the Brazilian Air Force did the thing governments almost never do: it sent an official team to find out. The result, Operação Prato, is one of the most heavily documented UFO investigations in history — and the paper trail is precisely what makes the case worth taking seriously, whatever you conclude happened.

A note on the images. The dramatic 1977 photographs and sketches the Air Force produced are held at Brazil’s National Archives and are very likely still under copyright, so we don’t reproduce them here. The hero image above is a freely licensed photo of Colares’ own UFO imagery. To see the originals, consult the Arquivo Nacional holdings and the case overview on Wikipedia.

The “chupa-chupa”

Through 1977, residents of Colares, Pará — an island community in the Amazon delta — reported low, luminous objects that played beams of light down onto people, often at night, often through the roofs and windows of their homes. Those struck described a burning sensation, small puncture-like marks, headaches, dizziness, and a lingering weakness that local doctors compared to anemia. The townspeople named the lights “chupa-chupa” — “sucker-sucker” — out of a belief, repeated up and down the coast that year, that the beams were drawing their blood.

The town responded the way frightened communities do: nightly vigils, bonfires, fireworks, church bells — anything to keep the lights away. When that failed, the mayor, José Ildone Favacho Soeiro, did something consequential. He asked the Air Force to come.

Operation Saucer

The Brazilian Air Force (FAB) answered with Operação Prato — literally “Operation Plate,” but universally rendered “Operation Saucer.” Running from roughly October 1977 into early 1978, it was commanded operationally by Captain Uyrangê Hollanda, under senior officers, and — tellingly for the era — run alongside the SNI, the military dictatorship’s intelligence service.

For months the team did fieldwork most ufologists can only dream of: interviewing hundreds of witnesses, collecting medical reports on the injuries, and waiting in the dark with cameras. They captured photographs and film of lights maneuvering over the water and the treeline. They drew careful sketches of the shapes witnesses described. They filled a dossier.

And then the official verdict landed, deflating: the operation found no unusual phenomena, and was closed. That single line is the heart of the Colares paradox — a military investigation thorough enough to produce a small archive, concluding, officially, that there was nothing to see.

What the files actually contain

This is where Colares stops being a normal case. The Operação Prato material is real, and it’s accessible: the FAB released UFO-related documents around 2009–2010, and the dossier sits in the National Archives. Reporting at the time confirmed the broader context — that the SNI had quietly tracked UFO reports throughout the dictatorship.

What the files document is not a saucer on a lawn. It’s something subtler and, in some ways, more unsettling: a sustained, geographically concentrated wave of injury reports, taken seriously enough by a national air force to mount a months-long operation, and recorded in the bureaucratic language of a military that did not want to look credulous. Ufologists like Jacques Vallée, who examined the case, noted that the described injuries were consistent with microwave or radiation exposure — a detail that is either a clue or a coincidence, and the files don’t settle which.

The captain’s epilogue

There is a darker coda the case can’t shake. In 1997, twenty years on, Hollanda broke his long silence in an interview with ufologists, describing genuine encounters and the fear that ran through his team. About three months later he was found dead at home, ruled a suicide. No evidence ties his death to the investigation — but in a case already steeped in dictatorship-era secrecy, the timing was enough to launch a permanent sub-genre of conspiracy theory. We log it as what it is: a tragedy, and an unproven link.

How to weigh it — and where it scores

Be careful in both directions. The sincere, large-scale injury reports are real, and so is the extraordinary official record. But “documented” is not “extraterrestrial”: the photos show ambiguous lights, the Air Force’s own conclusion was nothing unusual, and there are serious mundane candidates — mass-sociogenic illness, misperceived aircraft and astronomical objects, and conventional medical explanations for the symptoms — that a fair reading has to hold open.

On our four-axis Signal-Strength rubric (see the badge above), that combination lands Colares at Credible — and notably, it gets there almost entirely on the official-record axis. It has strong witnesses and a genuine government investigation, but weak instrumentation and real debunking candidates. That places it above far more famous cases on our ranked case files — not because the lights were proven, but because almost no other case comes with a months-long military operation and an archive you can actually request. It’s the cleanest illustration of the rubric’s core point: a case gets strong when the evidence survives outside any one witness’s memory — and Colares survives inside a filing cabinet at the Arquivo Nacional.

What to make of it

Colares is the rare UFO case where the interesting question isn’t “did the witnesses make it up” — too many people, too many doctors, too much paperwork for that. The interesting question is what a real, frightened community and a real air force were actually documenting: a genuine anomalous phenomenon, a regional panic that manufactured its own symptoms, or some braid of the two. The official answer was “nothing.” The official files say otherwise about how seriously “nothing” was taken.

When a researcher finally publishes the full dossier with rigorous medical and photographic analysis, we’ll update this page. Until then, Colares stands as the best-documented UFO case that a government ever officially decided was not a UFO case at all.

Compare Brazil’s other landmark case, the Varginha ‘ET’ incident, and see where every reported being-type sits on the evidence.