SPEROs (pronounced as 'spare-oh', or sparrow) are probes sent by the Koppaites to search for a planet with edible sustenance on it in order to save their planet Koppai, as seen in the opening sequence of Pikmin 3. SPERO 3 is the last one searching and is the one that finds PNF-404, a planet with bountiful food to sustain Koppai's population.