Buceros erythrorhynchus Public domain scan of 19th-century zoological illustration, free to use, no copyright restrictions image
Buceros erythrorhynchus Public domain scan of zoological print or book illustration, zoology, free to use, no copyright restrictions image - Picryl description
Public domain scan of Bird 18th-century zoological illustration, free to use, no copyright restrictions image - Picryl description
5 J. G. Keulemans lith. TOCKUS ERYTHRORHYNCHUS Hanhart imp. 36 r
A monograph of the Bucerotidæ, or family of the hornbills. J. G. Keulemans lith. TOCKUS ERYTHRORHYNCHUS Hanhart imp. 36