Common Tree Snake

Fascinating facts about the Common Tree Snake

• A Queensland study found female common tree snakes average 101 cm (40 in) from snout to vent, while males are a bit shorter at 93 cm (37 in). Some females can grow to a total length of 200 cm (79 in), though most sources cite a maximum overall length of 164 cm (65 in) with a 44 cm (17 in) tail.
• The snake’s range stretches from Western Australia’s Kimberley region across Queensland’s Cape York and Torres Strait, down the east coast to New South Wales, and even into Papua New Guinea. It thrives from sea level up to 500 m (1,600 ft) in habitats as different as rainforest edges, eucalypt forests, heathlands and urban gardens with water features. This adaptability highlights how a single reptile can bridge wild and human-made environments.
• When hunting near water, the common tree snake blends into long grass and watches for frogs, water skinks, small reptiles, their eggs, and even tiny fish, mammals, geckos and turtle hatchlings. Its sharp, angled teeth let it ‘chew’ prey down the oesophagus instead of crushing it. This feeding strategy lets the snake exploit a surprisingly wide menu of prey across land and water.
• Being oviparous, a female lays between 5 and 12 elongated eggs in each clutch.
• If threatened, the snake may release a cloacal odor and sometimes inflate its body and neck to look larger, a classic bluff that can deter predators. More often, it simply darts away to safety. These simple yet effective defenses remind us that even harmless snakes have clever tricks to survive.

At a glance

About the Common Tree Snake

The common tree snake, Dendrelaphis punctulatus, glides through the verdant fringe of Australia’s northern tropics and eastern coastlines with a lithe, almost filamentous body that can stretch to nearly two metres in length. Its ventral surface shimmers from golden-yellow to deep green, occasionally turning black or even blue, while the dorsal side remains a darker hue, accented by subtle blue flecks along the flanks. Large, golden-iris eyes and a rounded pupil give it an alert, inquisitive stare, and its 24–26 angled maxillary teeth are perfectly fashioned for slicing prey into swallow-ready morsels rather than constricting them. This diurnal, non-venomous colubrid frequents a mosaic of habitats, rainforest edges, eucalypt woodlands, heathlands, and even suburban gardens where fountains and long grass provide both hunting grounds and camouflage. Near water, it becomes an adept swimmer, slipping silently beneath the surface to ambush fish, frogs, water skinks, and the occasional turtle hatchling, while at night it retreats to hollow trees, logs, or rock crevices, ever ready to blend into the foliage of its arboreal realm. A surprising facet of its behavior emerges when the snake feels threatened: it may emit a cloacal odour, inflate its body and neck, or deliver a brief bite, yet more often it opts for a swift escape, darting into the canopy or slipping into the water. Reproductive cycles are modest, with females laying five to twelve elongated eggs per clutch, ensuring that this agile predator continues to weave through Australia’s ecosystems with quiet efficiency.

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