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/38534663
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/38534705
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/38534733
Northern (Abyssinian) Ground Hornbill (Bucorvus abyssinicus) in captivity at African Park, San Diego, California, USA. Photographed on 3 July 2002. A native of Central Africa.www.inaturalist.org/observations/54794459
Sulawesi knobbed hornbill, Knobbed hornbillFamily: Bucerotidae (The Hornbills)Range: Endemic to Indonesia (Sulawesi, Buton, Lembeh, Togian and Muna Island)Status: Vulnerable (IUCN)Photo: Bronx Zoo, New York City, New York, USAMale: Lower leftFemale: Upper right
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/38534557