The black tree cobra (Pseudohaje nigra) is a species of venomoustree cobra found in central and western Africa. This species is one of the two tree cobras in Africa, the other being Goldie's tree cobra (Pseudohaje goldii).
^Boulenger GA. 1896. Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the Colubridæ (Opisthoglyphæ and Proteroglyphæ) ... London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). xiv + 727 pp. + Plates I-XXV. (Naia guentheri, p. 388 + Plate XXI, three views of head).
Further reading
Günther A. 1858. Catalogue of the Colubrine Snakes in the Collection of the British Museum. London: Trustees of the British Museum. (Taylor and Francis, printers). xvi + 281 pp. (Pseudohaje nigra, new species, p. 222).