The species is native to Southeast Asia.

The specific name, haasi, is in honor of Dutch herpetologist C.P.J.

[5] The preferred natural habitat of D. haasi is forest, at altitudes near to sea level, but it has also been found in gardens.

[1] D. haasi is slender and has a very long tail, which is 34% to 38% of its total length.

This colubrid snake article is a stub.