Carlos Eduardo dos Santos Galvão Bueno, known as Galvão Bueno (Portuguese pronunciation: [ɡawˈvɐ̃w̃ buˈenu]; born 21 July 1950), is a Brazilian television personality and commentator, where he hosted Brazil national football team matches, key Brazilian football championship matches, top sporting events and Formula One races.

Galvão moved to Rede Globo where he continued hosting Formula 1 and football, but in 1992 he left to become the head of the sports department at OM (now CNT).

[7] International reaction from non-Brazilians was generally confusing, with first hoaxes claiming it was a movement to save a Brazilian bird mostly because of the similarity between the words Galvão and "Gavião", Portuguese for hawk.

A fake Twitter account named galvaoinstitute[8] was set up as a joke for non-Portuguese speakers to repeat the sentence "CALA BOCA GALVÃO", claiming US$0.10 would be donated to save the bird each time those words were replied.

A second wave of jokes started when Brazilian users claimed "Cala Boca Galvão" was a new single by Lady Gaga aimed at saving those birds.

[10] Brazilian writer Paulo Coelho played another joke by claiming that "CALA BOCA GALVÃO" was a homeopathic medicine also known as "SILENTIUM GALVANUS", making a reference for the commentator to stay quiet.

The expression "Pobres Australianos"[12] ("Poor Australians" in Portuguese, as a reference to the 4-0 defeat to Germany in the World Cup) was also added to the hoax when Brazilians claimed it was another single by Lady Gaga aimed at saving the fictional Galvão bird.

Brazilian Twitter users soon began spreading another tweet which reads "CALA BOCA GALVÃO is the biggest inside joke in history.

The global proportion of this hoax resulted in articles written all over the world, in several different languages, explaining the joke played by Brazilians from blogs[14] to El País[15] and The New York Times.