Northern Tree Snake (species: Dendrelaphis calligastra) in Lizard Island area: all known taxa (Lizard Island Field Guide)
Dendrelaphis calligastra
Northern Tree Snake

©Anne Hoggett: Dendrelaphis calligastra at Lizard Island.

©Kyle Michie: Dendrelaphis calligastra at Lizard Island Research Station.

©Kyle Michie: Dendrelaphis calligastra at Lizard Island Research Station.
Kingdom Animalia
Phylum Chordata
Class Reptilia
Order Squamata
Family Colubridae
Genus Dendrelaphis
Species Dendrelaphis calligastra



Distinguishing features

A slender snake up to 1 metre long with very large eyes and round pupils. Dark green/grey/brown above with a black streak from snout through eye to body and pale yellow below.

These snakes can move quickly within trees. They are active during the day and harmless.


  • Up to 100 cm (overall length, Wilson and Swan, 2010)



©Atlas of Living Australia: Australian distribution

Web resources


References that assist with identification

  • Wilson, S. and G. Swan (2010). A Complete Guide to Reptiles of Australia: 3rd Edition 558 pp. New Holland Publishers, Australia.

Other references

  • Limpus, C.H. (1982). The reptiles of Lizard Island, Herpetofauna, 13(2): 1-6. LIRS catalog number 73.