Pteroglossus humboldtiiStillImageDrawing depicting: Pteroglossus humboldtiiGould, John , 1804-1881 (artist)Richter, Henry Constantine , 1821-1902 (artist)Reference drawing, not intended as layout model. Small piece of paper, with rough, diagramatic sketch and notes indicating the colors around the eye.ku-gould:19890https://digital.lib.ku.edu/ku-gould/19890Gould 293OrnithologyOrnithological illustrationelectronicimage/tiffMonograph of the Ramphastidae, or family of toucans--Ellis Aves H17This work is free of known copyright restrictions.