Description: Original caption: "Yellow-casqued Hornbill carrying food - Ankasa - Ghana 14_S4E1937" (= Ceratogymna elata) English: An Yellow-casqued Hornbill (Ceratogymna elata) in the Ankasa Conservation Area (Ghana) Deutsch: Ein Goldhelm-Hornvogel (Ceratogymna elata) im Ankasa-Naturschutzgebiet (Ghana). Date: 4 December 2014, 08:57. Source: Yellow-casqued Hornbill - Ghana_S4E1937. Author: Francesco Veronesi from Italy.
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/38534601