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/38534617
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/38534551
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/38534613
Southern Yellow-billed Hornbill (Tockus leucomelas) in captivity at the Birds of Eden Park Free Flight Bird Sanctuary at Plettenberg Bay, South Africa. Photographed on 19 June 2012.Native of Southern Africa.www.inaturalist.org/observations/52636731