Pachycephala pectoralis -- Australian Golden Whistler. Alternate name on piece: Pachycephala melanura [Black-tailed pachycephala] Artist's name(s): Gould, John; Richter, Henry Constantine. Richter has given special attention to the head and wing of one bird and established the shape of both; Gould's work shows clearly through, as well as his later pencil marks calling for shortening of body.