The Western Yellow Wagtail, Motacilla flava, is a small, graceful passerine bird belonging to the wagtail family, Motacillidae. This species is noted for its slender build and the characteristic long, constantly wagging tail, a hallmark of its genus. Among its European relatives, it boasts the shortest tail. The adult male in breeding plumage is predominantly olive above with a vibrant yellow underbelly. Females and non-breeding males may exhibit a paler yellow, often intermixed with white.
To identify the Western Yellow Wagtail, look for a bird measuring about 15–16 cm in length. Breeding males display a variety of head colors and patterns, which can be quite distinctive, depending on the subspecies. In general, males have a more vivid plumage compared to the females, which are more subdued and often have a greenish wash.
This insectivorous bird favors open country near water sources, such as wet meadows, where it can be seen foraging for food.
The Western Yellow Wagtail breeds across much of temperate Europe and Asia. It is a resident bird in the milder parts of its range, like western Europe. However, populations from the north and east undertake migrations to Africa and south Asia to escape the winter chill.
The Western Yellow Wagtail is known for its dynamic tail movement, which it exhibits while walking on the ground. It is a sociable bird, often seen in small flocks during migration or in its wintering grounds.
The call of the Western Yellow Wagtail is a distinctive high-pitched 'jeet', which can be heard during its active periods.
Breeding takes place in tussocks, where the female lays a clutch of 4–8 speckled eggs. The nest is often situated close to the ground, concealed within dense vegetation.
The Western Yellow Wagtail can be confused with other wagtail species, but its shorter tail and the color variations in the breeding male's head plumage are helpful distinguishing features.
As an insectivore, the Western Yellow Wagtail feeds primarily on insects, which it catches with quick, darting movements on the ground or in flight.
The IUCN Red List categorizes the Western Yellow Wagtail as Least Concern, indicating that, currently, there are no significant threats to its global population.