Walking home at dusk this week over El Puente de Piedra, I noticed a large flock of White Wagtails flying around below. With the cold weather here at last, these birds form flocks of twenty or more and frequent the small islands that are exposed in the river when the water level is not too high.

Motacilla alba

Motacilla alba, White Wagtail, Lavandera Blanca, River Ebro, Zaragoza (Photo courtesy of David Bowyer, Aragon Birding)