The Motacilla alba is commonly known as the White Wagtail. It is of the Motacillidae Family and was first published in 1758.
The White Wagtail is a slender bird, 16.5–19 cm in length with the characteristic long, constantly wagging tail of its genus. Its average weight is 25 g and the maximum lifespan in the wild is 12 years.
Find more information on Wikipedia.

Motacilla Alba White Wagtail