It's the same fish. It is one of the common names of a small bird that lives in swamps and wetlands. It is also known as pitite or laundy. Its scientific name is Motacilla alba and belongs to the Motacidae family. The snow hole or pitite feeds on insects and small crustaceans.
snow-like aguza-refers to the expression : insectivorous bird, small, passehora, nests in the rocky walls and natural similar, gray, white belly, wings and black tail and has as particularity announce to man the arrival of cold weather-
ACAÑITATA-SLEETS-SMALL-APURANIEVES-AVECILLA-PAJARITA OF THE CAUDATRÉMULA-DORADILLO SNOW-SPECIES-CULIBLANCO-NUN-PEZPITA-PEZPITALO-MOTACILA-PIZPITILLO-NEVETERA-RABICANDIL-MISS-