Pteroglossus humboldtiiStillImageDrawing depicting: Pteroglossus humboldtiiGould, John , 1804-1881 (artist)Richter, Henry Constantine , 1821-1902 (artist)Pencil sketch of 2 birds, with color added.ku-gould:19885https://digital.lib.ku.edu/ku-gould/19885Gould 0297aOrnithologyOrnithological illustrationelectronicimage/tiffThis work is free of known copyright restrictions.