A monograph of the Bucerotid, or family of the hornbills..[London]Published for the subscribers by the author [printed by Taylor and Francis]1882..biodiversitylibrary.org/page/38534633
A monograph of the Bucerotid, or family of the hornbills..[London]Published for the subscribers by the author [printed by Taylor and Francis]1882..biodiversitylibrary.org/page/38534497
A monograph of the Bucerotid, or family of the hornbills..[London]Published for the subscribers by the author [printed by Taylor and Francis]1882..biodiversitylibrary.org/page/38534493
Summary[edit] Description: English: Sri Lanka Grey Hornbill in Sinharaja Rainforest. Date: 27 October 2012, 11:37:27. Source: Own work. Author: Pinkstg.
Summary[edit] Description: Female Tarictic Hornbill (Penelopides panini) at Bristol Zoo, Bristol, England. Photographed by Adrian Pingstone in September 2005 and released to the public domain. Date: 18 September 2005 (according to Exif data). Source: Own work. Author: Arpingstone.