Mauro is the leader of the marmosets and Nigel's henchman. In Angry Birds Rio, he appears as a boss in level 8-15 of Carnival Upheaval and in 14-15 of Market Mayhem. In Market Mayhem, he brought along some of his army of Marmosets to assist him. It takes a lot of damage to defeat him. The best tactic to defeat Mauro is to use the White Bird's egg bombs.