The common name, Pirmad cat snake, refers to Peermade (also spelled Peermad, Pirmaad, Pirmed, and Pirmedu), a place in Kerala, India, elevation 3,300 feet (1,006 m).
B. dightoni is pale reddish-brown dorsally, with a series of salmon-red blotches. Its head is pale brown with minute blackish dots. Ventrally, it is yellowish, finely-dotted with brown. The outer ends of the ventral scales are salmon-pink. It is medium-sized, adults attaining a total length (including tail) of 1.1 m (3.6 feet).[5]
^ abcdefDas I (2002). A Photographic Guide to Snakes and other Reptiles of India. Sanibel Island, Florida: Ralph Curtis Books. 144 pp. ISBN0-88359-056-5. (Boiga dightoni, p. 22).
^ abBeolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN978-1-4214-0135-5. (Boiga dightoni, p. 72).
^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. (Dipsadomorphus dightonii, new combination, pp. 69–70).
Boulenger GA (1894). "Description of a New Snake Found in Travancore, by Mr. S. Dighton. Pirmaad." Journal of the Bombay Natural History Society8: 528 + one plate. (Dipsas dightoni, new species).
Inger RF, Shaffer HB, Koshy M, Bakde R (1984). "A report on a collection of amphibians and reptiles from the Ponmudi, Kerala, South India". Journal of the Bombay Natural History Society81 (3): 551–570. (Boiga dightoni, pp. 567–568).
Kanagavel, Arun; Ganesh, S.R. (2921). "Recent Record of the Rare Travancore Catsnake, Boiga dightoni (Boulenger 1894) (Reptilia: Colubridae), from the Ponmudi Hills in the Southern Western Ghats, India". Reptiles & Amphibians28 (1): 67–70.
Smith MA (1943). The Fauna of British India, Ceylon and Burma, Including the Whole of the Indo-Chinese Sub-region. Reptilia and Amphibia. Vol. III.—Serpentes. London: Secretary of State for India. (Taylor and Francis, printers). xii + 583 pp. (Boiga dightoni, new combination, pp. 359–360).