White WagtailMotacilla albaWhere and when to see them

The White Wagtail is a slim black, white and grey bird often noticed running along open ground. BTO describes rapid tail-wagging and pursuit of insect prey. The three river associations have different evidence: a lower Saône biodiversity guide, a historical Nile cruise report and a Douro estuary occurrence listing. Species reference: https://www.bto.org/learn/about-birds/birdfacts/piedwhite-wagtail

Size

Species-specific length not verified.

Weight

22.9 g; BTO species reference value.

Lifespan

Species-specific lifespan not verified.

Status

Formal global assessment not verified in the retrieved material.

Birds run and pause while searching the ground, repeatedly moving the long tail. BTO also describes winter communal roosting in urban settings. Those species-level observations do not establish a roost or a seasonal concentration at any of the three registered reaches.

• It pursues insect prey.
• Tail-wagging is conspicuous.
• It often runs on open ground.
• Urban areas can be used.
• Communal roosting occurs.
• White and Pied Wagtails belong to Motacilla alba.
• The Nile record is historical trip evidence.

No recurring numerical calendar was verified for the three exact reaches. The Nile’s March 2007 record is a single trip, while the other entries establish occurrence. A municipal year-round page found for a different Gaia project is not transferred to the Douro reserve.

Banks, quays and other open surfaces can provide feeding opportunities. The Saône location is the promenade upstream of Lyon’s Rhône confluence; the Nile corridor extends from Luxor to Aswan; the Douro site is the estuary near Porto. None implies universal riverwide occurrence.

BTO explicitly describes pursuit of insect prey. A species-specific local prey list for the three rivers was not verified. Watching repeated short runs and pecks may reveal feeding, but the small captured items are often impossible to identify from a cruise deck.

Common name

White Wagtail

Scientific name

Motacilla alba

Animal group

Birds

Size

Species-specific length not verified.

Weight

22.9 g; BTO species reference value.

Lifespan

Species-specific lifespan not verified.

Status

Formal global assessment not verified in the retrieved material.

Identification

Look for a slender bird with a long tail and contrasting black, white and grey plumage. BTO distinguishes the continental White Wagtail form from British Pied Wagtail within Motacilla alba. Age and season alter head markings, so identification should use several features.