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Blocos are the street bands and groups that are the main popular expression in Carnival of Pernambuco in Brazil. These demonstrations are mixed under the term "street carnival", a term that still includes the bandstands and parades at streets of Olinda and Recife, and happen during a period of about two months (beginning before and finishing after Carnival).
The biggest bloco is the Galo da Madrugada that attracts more than 2,000,000 people to downtown Recife.