Aegithalos caudatus -- Long-tailed Bushtit. Alternate name on piece: Mecistura caudata [Long-tailed tit]. Litho proof with only adult birds colored, a third adult sketched in lightly; 5 notes on form; Gould item 757 shows a later stage, with one bird changed; from close comparison with the published plate it appears that the whole image was redrawn on the stone in order to effect relatively small changes. Artist's name(s): Gould, John; Richter, Henry Constantine.