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Northern tree snake

northern tree snake (Dendrelaphis calligastra)
Mount Lewis, Queensland
Photo © Stephen Zozaya
Dendrelaphis calligastra - (G√ľnther, 1867)
Pronunciation  DEN-drel-AH-fiss   KALL-ee-GASS-trah
Etymology  Dendrelaphis: 'tree Elaphe', after another genus of colubrid snake.
calligastra: 'beautiful-bellied'.
Other names  Dendrophis calligastra
Dendrelaphis calligaster
Total length
Species avg: 80 cm
Species max: 120 cm
Clutch size
Average: 7
Range: 5 - 12
Length and clutch size information comes from a variety of sources, but primarily from Shine (1991) and Cogger (2000).
Description Distribution Natural history Conservation Further information More photos


Long and slender with a relatively long tail. Triangular in cross-section. The eye is large, with a dark streak running from the eye along the neck. The skin between the scales is a pale blue. When the snake expands its body, these pale specks become obvious.

Similar species

Common tree snake (Dendrelaphis punctulatus) - lacks the dark streak through eye.

Scale count information

Dorsal scales at midbody   13 to 15
Ventrals   180 to 230 with a divided anal scale
Subcaudals   90 to 150 and are divided
Other scale information  
Danger rating   Non-venomous. Not considered dangerous.
Note: even a bite from a 'virtually harmless' or non-venomous reptile can result in serious complications. Play it safe and don't get bitten by anything.
Notes and disclaimer
This information may not be complete. While all care is taken to ensure the accuracy of the information in this page, primary sources should always be consulted for definitive information. Animals have an endearing habit of disobeying the rules, so the information on this page should be interpreted with a degree of flexibility.
The author and site operator accepts no responsibility for any losses or damages incurred through using this web site or the information contained herein. Don't get bitten by anything!
This page may be cited as:
  Dendrelaphis calligastra at the Australian Reptile Online Database. Last updated 2017-08-10 10:51:11.
  Retrieved from on the 22nd of October, 2021.
Before citing information contained in AROD, please read our Citing AROD page.

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This page, its content and layout are copyright © 2007-2021 Stewart Macdonald / Ug Media, unless otherwise stated.
All photographs in The Australian Reptile Online Database are © the photographer and may not be reproduced in any form without the express written consent of the photographer.
No part of The Australian Reptile Online Database may be reproduced without written permission from Stewart Macdonald.
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