Dendrelaphis haasi

Dendrelaphis haasi
Conservation status
Least Concern  (IUCN 3.1) [1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Colubridae
Subfamily:	Ahaetuliinae
Genus:	Dendrelaphis
Species:	D. haasi
Binomial name
Dendrelaphis haasi van Rooijen & G. Vogel, 2008

Dendrelaphis haasi, also known commonly as Haas' bronzeback, Haas's bronzeback, Haas's bronzeback snake, and Haas's bronzeback tree snake, is a species of snake in the family Colubridae. The species is native to Southeast Asia.

Etymology

The specific name, haasi, is in honor of Dutch herpetologist C.P.J. de Haas. ^[2]

Taxonomy

Dendrelaphis haasi belongs to the genus Dendrelaphis , which contains 48 other described species. ^[3]

Dendrelaphis is one of five genera belonging to the vine snake subfamily Ahaetuliinae, of which Dendrelaphis is most closely related to Chrysopelea , as shown in the cladogram below: ^[4]

Ahaetuliinae	sharp‑nosed snakes Ahaetulla Proahaetulla Dryophiops broad‑nosed snakes Dendrelaphis Dendrelaphis marenae Dendrelaphis haasi Dendrelaphis pictus Dendrelaphis ngansonensis Dendrelaphis cyanochloris Dendrelaphis striatus Dendrelaphis formosus Dendrelaphis tristis Dendrelaphis subocularis Dendrelaphis schokari Dendrelaphis fuliginosus Dendrelaphis caudolineatus Chrysopelea

Geographic range

D. haasi is found in Bangladesh, ^{[5] [6]} Brunei, Indonesia, Malaysia, and Singapore. ^[7]

Habitat

The preferred natural habitat of D. haasi is forest, at altitudes near to sea level, but it has also been found in gardens. ^[1]

Description

D. haasi is slender and has a very long tail, which is 34% to 38% of its total length. ^[7] The holotype has a snout-to-vent length of 57.5 cm (22.6 in), plus a tail length of 33 cm (13 in). ^[8]

Behavior

D. haasi is diurnal and fully arboreal. ^[7]

Diet

D. haasi preys upon frogs and lizards. ^[1]

Reproduction

D. haasi is oviparous. ^[7]

References

1. Vogel, G.; Wogan, G.; Grismer, L.; Chan-Ard, T. (2012). "Dendrelaphis haasi ". IUCN Red List of Threatened Species . 2012 e.T191993A2025179. Retrieved 23 April 2023.
2. Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN   978-1-4214-0135-5. (Dendrelaphis haasi, p. 113).
3. Genus Dendrelaphis at The Reptile Database.
4. Mallik, Ashok Kumar; Achyuthan, N. Srikanthan; Ganesh, Sumaithangi R.; Pal, Saunak P.; Vijayakumar, S. P.; Shanker, Kartik (27 July 2019). "Discovery of a deeply divergent new lineage of vine snake (Colubridae: Ahaetuliinae: Proahaetulla gen. nov.) from the southern Western Ghats of Peninsular India with a revised key for Ahaetuliinae". PLOS ONE . 14 (7) e0218851. Bibcode:2019PLoSO..1418851M. doi: 10.1371/journal.pone.0218851 . ISSN   1932-6203. PMC   6636718 . PMID   31314800.
5. Rana, Md. Shohel; Biswas, Sajid; Datta, Ashis Kumar; Akhtar, Sharmin; Hasan, Md. Kamrul (26 September 2025). "New records of two species of the genus Dendrelaphis Boulenger, 1890 (Serpentes, Colubridae) from Bangladesh". Check List. 21 (5): 831–839. doi: 10.15560/21.5.831 . Retrieved 1 October 2025.
6. জাইন্ড, জারা (1 October 2025). "বাংলাদেশের বনে নতুন দুই প্রজাতির সাপের সন্ধান" [Two new species of snakes discovered in Bangladesh forests]. bigganbarta.org (in Bengali). Bangladesh: BigganBarta. Retrieved 1 October 2025.
7. Dendrelaphis haasi at the Reptarium.cz Reptile Database . Accessed 26 February 2016.
8. van Rooijen J, Vogel G (2008).

Further reading

• Das I (2012). A Naturalist's Guide to the Snakes of South-East Asia: Malaysia, Singapore, Thailand, Myanmar, Borneo, Sumatra, Java and Bali. Oxford, England: John Beaufoy Publishing. 176 pp. ISBN   978-1906780708.
• Lim KKP, Cheong LF (2011). "Dendrelaphis haasi (Reptilia: Squamata: Colubridae), a new snake record for Singapore". Nature in Singapore4: 9–12.
• van Rooijen J, Vogel G (2008). "Contributions to a review of the Dendrelaphis pictus complex (Serpentes: Colubridae) – 1. Description of a sympatric species". Amphibia-Reptilia29 (1): 101–115. (Dendrelaphis haasi, new species, pp. 108–112 + Figures 4, 5A–5D).
• Vogel G (2010). "Zur Systematik der Schlangen der orientalischen Region: Forschungsdefizite führen zur Unterschätzung der Artenvielfalt ". Ophidia4 (2): 18–26.