The Grey Wagtail (Motacilla cinerea) is a small member of the wagtail family, Motacillidae. The species looks similar to the Yellow Wagtail but has the yellow on its underside restricted to the throat and vent. Breeding males have a black throat. The species is widely distributed, with several populations breeding in Europe and Asia and migrating to tropical regions in Asia and Africa. They are usually seen on open marshy ground or meadows where they walk solitarily or in pairs along the ground, capturing insects that are disturbed. Like other wagtails, they frequently wag their tail and fly low with undulations and they have a sharp call that is often given in flight.The breeding season is April to July and the nest is placed near fast running streams or rivers on an embankment between stones and roots. In Europe the nests are often made in holes in manmade structures. These birds feed on a variety of aquatic invertebrates including adult flies, mayflies, beetles, crustacea and molluscs
Text and photograph courtesy of Wikipedia.