Brisson, Mathurin Jacques (1760). Ornithologie, ou, Méthode Contenant la Division des Oiseaux en Ordres, Sections, Genres, Especes & leurs Variétés (in French and Latin). Vol. 5. Paris: Jean-Baptiste Bauche. pp. 303-308, Plate 26 fig. 2. The two stars (**) at the start of the section indicates that Brisson based his description on the examination of a specimen.