It is the scientific name of a bird of the family Motacillidae. It is known by other common names such as: snow bow tie, snow hole, pitite or white laundy.
motacilla alba-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 its particularity, announce to man the arrival of cold weather-