Turdus naumanni -- Dusky Thrush, Naumann's Thrush. Alternate name on piece: Turdus naumannii [Naumann's thrush] Sketch of bird, parts finished in watercolor with extreme care for the detail of feathers (which is a feature of Elizabeth Gould's work); annotations in at least two hands. Artist's name(s): Gould, John; Gould, Elizabeth.