Townsend's Bunting (Emberiza townsendii)?

Townsend's Bunting (Emberiza townsendii)?
Townsend's Bunting (Emberiza townsendii)?
Watercolor, graphite, collage, pastel, and black ink with touches of gouache and glazing on paper, laid on card
Paper: 20 1/8 x 13 15/16 in. (51.1 x 35.4 cm) Mat: 29 x 23 in. (73.7 x 58.4 cm)
One of Audubon's mystery birds, not associated with any known species.
Credit Line 
Purchased for the Society by public subscription from Mrs. John J. Audubon
Object Number 
Inscribed at the lower left in graphite: "No 73[over 4]."; at lower center: "Plate 369.[crossed out] 365 / Townsends Finch"; at lower right in brown ink: "Rosa Laevigata"; above: "The Crop of Bird / not to be noticed / in the Engraving -- "
Gallery Label 
The background flora has been identified as Rose (Rosa laevigata)
Due to ongoing research, information about this object is subject to change.
Creative: Tronvig Group