The Chupa-Chupa Attacks

What Was the Chupa-Chupa?

The pattern barely varied. A light approaches at night — low, silent, fast — and singles someone out: a woman asleep in a hammock, a man outside his house in the heat, someone walking home along the PA-16 road. A beam comes down, white or red, and holds on them. Witnesses describe heat, a jolt like electric shock, and being unable to move while the light is on them. Then it's gone, and the marks appear: reddened, burn-like patches and small punctures, as if the skin had been pierced.

The name came from what people believed the thing was doing — sucking blood — and the fear it generated was total. The Operação Prato reports describe communities that had stopped functioning at night: nobody fishing after dark, families sleeping in groups of twenty or thirty around fires, fireworks set off through the small hours to keep the sky away. In November 1977 the town council of Maracanã formally petitioned the Air Force, Navy and Army for protection. This was not a rumour passing through; it was a region under something it could not name.

The Victims the Military Interviewed

The first mission report of Operação Prato contains a witness section taken by Air Force investigators in the field. These are not stories collected by enthusiasts years later — they are statements recorded by a military intelligence team within weeks of the events, and they read like it: ages, occupations, education levels, exact dates and times. Four of them carry the case.

Beyond the military file, the best-known victim account belongs to Claudomira Paixão, a Colares woman struck in mid-October 1977. In interviews with researchers she described waking in her hammock to a beam that hit her chest three times in nearly the same spot — hot, like needles going in — while a figure in what she compared to a diver's suit pointed something at her. She could not move her legs while it happened. Her account, repeated over decades of interviews, matches the military statements she never read.

Dr. Wellaide Cecim Carvalho: The Doctor Who Wouldn't Play Along

Every account of the chupa-chupa wave runs through one person. Wellaide Cecim Carvalho was in her early twenties, newly qualified, running the state health post on Colares — which made her the only medical professional standing between the phenomenon and its victims at the epicentre of the wave.

Her testimony, given consistently from a recorded 1984 statement through decades of later interviews, comes down to this: she treated dozens of patients with the marks. The burns were superficial but real — reddened skin that in some cases darkened and lost its hair, which to her resembled radiation injury more than anything else. The puncture marks clustered on the upper chest, near the carotid. The patients were poor fishing families who gained nothing from the attention and were visibly afraid. She checked for the obvious — insect bites, infection, invention — and the explanations didn't fit what she was looking at.

Two more things give her account its weight. She has said that visiting officials pressured her to tell the community the events were mass delusion, and she refused. And she became a witness herself — watching a silent object from the Colares waterfront during the wave. She has never claimed to know what the phenomenon was. She has only ever insisted that her patients' injuries were real, which is the one claim she was uniquely qualified to make.

The Air Force's Medical Verdict

The military heard the sceptical case too — from its own doctors. Operação Prato's medical mission, Lieutenant Pedro Ernesto Póvoa and Aspirant Augusto Sérgio Santos de Almeida, worked the same villages as the field team, interviewing residents who described being bitten or stung at the neck, losing the use of their limbs, losing speech. They examined two people immediately after claimed beam strikes and recorded racing pulses, muscle tremors, rapid breathing, crying and stammering. They treated one with a tranquiliser and one with a placebo. By the next day, both patients reported only tiredness.

Their two-page report concludes that everything they saw was a normal adrenaline discharge — the body's fight-or-flight response — triggered by fear of the unknown and spread "epidemically" through a community where everyone knows everyone, "circulating a climate of collective hysteria". What people attributed to the rays of the OVNI, the doctors wrote, was the organism reacting normally to terror.

It's a serious explanation, and parts of the file support it: panic was certainly real and certainly contagious. But it answers a different question to the one the case asks. Adrenaline explains racing pulses and stammering. It does not explain paired puncture marks, burns that shed hair, or a man numb down one side for eight days — and the medical report doesn't engage with the marks at all. The field team noticed the gap: their own reports treat the victims' physical accounts as too consistent to dismiss. The two halves of the operation looked at the same villagers and wrote down different conclusions, and both are in the file.

The Deaths That Were Never Investigated

No death has ever been officially attributed to the chupa-chupa. The qualifier matters, because "officially attributed" is not the same as "none reported". Researcher Jacques Vallée, who studied the case on the ground in the 1980s, wrote that local accounts linked at least two deaths to the wave. Dr. Carvalho has described a patient with severe chest burns who died the same evening — the death certificate said heart attack, made no mention of the burns she had examined that morning, and no autopsy was performed. And the Navy's intelligence file from November 1977, released decades later, notes a body found at a river mouth near a reported sighting location, flagged as a possible connection and then never mentioned again.

None of this is proof of anything. It is, though, a documented pattern of cases that were never followed up — in a region where death certificates for poor fishing families did not attract second opinions.

The Evidence

The Bottom Line

Strip the case down to what's documented and it is still remarkable. In 1977, on one stretch of Brazilian coast, enough people were physically marked by something in the night sky that a doctor spent months treating them, a town council begged three armed services for protection, and a military intelligence team took formal statements from the injured and mapped them as a category of data. The institution's doctor said fear; the institution's field team said the accounts held up; the institution itself said nothing for thirty years and then released the file.

Maybe the marks have a mundane cause that was simply never found — the area was poor, remote, and full of things that bite, burn and infect. But that explanation has to get past Dr. Carvalho, who lived there, treated the patients, knew the local hazards, and says it wasn't any of them. The chupa-chupa is what a UFO case looks like when the evidence is people: imperfect, unprovable, and very hard to wave away.

Download the Original Documents

The victim statements and both medical perspectives are in the files we host. All are scans of the original 1977 documents, in Portuguese.