About 500 demonstrators tossed red powder on central Madrid's Puerta del Sol square, representing the blood of the 20,000 bulls that are killed each year in the country. Photo:VCG

In addition, tens of thousands of protesters rallied in Madrid on Sunday, calling for a ban on bullfighting in Spain. Photo:VCG

Animal rights supporters also demanded bullfighting to be removed from the country's list of national heritage. Photo:VCG

Over 40,000 people participated in the protest, according to organizers from the activist group Tauromaquia Es Violencia (Bullfighting is Violence).Photo:VCG