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A monograph of the Bucerotid or family of the hornbills Plate IX . Keulemans liih fanha HYDRO CORAX SEMI GALE AT US JLJU Plate IX Illustration biodiversitylibrary org title Elliot Daniel Giraud NameFound Corax semi NameFound Hydrocorax semigaleatus NameConfirmed Hydrocorax semigaleatus Biodiversity Heritage Library monograph