Dendrophis pictus ngansonensis Bourret, 1935 Dendrelaphis ngansonensis, commonly known as either the Nganson bronzeback or Nganson bronzeback tree snake, is a species of snake in the family Colubridae, sound in Southeast Asia.

The species name ngansonensis is named after the type locality of the Ngân Sơn district of Tonkin, North Vietnam.

[3] D. ngansonensis is most closely related to Dendrelaphis cyanochloris, and together the two might form a species complex.

[1][2] Dendrelaphis ngansonensis is an arboreal snake[1][2] that occurs in both primary and secondary forests.

[1] It has been found to be both diurnal and nocturnal, and has oviparous reproduction.