Motacilla alba -- White Wagtail; Lavandera blanca. Alternate name on piece: Motacilla yarrelli [Pied wagtail]. Fine layout watercolor; left bird cut out and pasted on; note on background; neither bird's position retained in published plate, background modified. Title in pencil by Sotheran, bookseller. Artist's name(s): Gould, John; Richter, Henry Constantine.