Aegithalos caudatus -- Long-tailed Bushtit. Alternate name on piece: Mecistura caudata [Long-tailed tit] Litho print, finely colored; the left hand bird has been partly and the position of the body and tail changed (Gould 765 shows an earlier stage); 9 notes on form and color; 2 sketches of birds in margin. From close inspection it appears that the whole image was redrawn on the stone in order to effect relatively small changes. Title in pencil by Sotheran, bookseller. Artist's name(s): Gould, John; Richter, Henry Constantine.