Dendrelaphis calligaster
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~60% in a week ~90%
Dendrelaphis calligaster, also called green tree snake, northern green tree-snake, and northern tree snake, is a colubrid snake native to New Guinea, Australia, and Solomon Islands. It is a slender, large-eyed, non-venomous, diurnal snake, which grows up to 1.2 m in length and is greenish, brown, or greyish above with a cream or yellow belly.
This common snake is harmless, and readily recognised due to its cream to yellow belly and pronounced wide dark facial stripe passing across the eye. The specific name calligaster means "beautiful-bellied". In Australia, Dendrelaphis calligaster are found on the eastern side of the Cape York Peninsula (Queensland) as far south as Mackay. On the western side, their range is poorly mapped. They also occur on many of the Torres Strait Islands. On the New Guinea mainland, they are widespread at elevations below 1,150 m (3,770 ft) in both Indonesian and Papua New Guinean parts of the island. They occur also on many nearby islands. The Reptile Database also lists this species from the Solomons.
Dendrelaphis calligaster is primarily arboreal but can also forage on the ground. It can be found in rainforest... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Daintree National Park | 🇦🇺 Australia | |
| 2 | Raja Ampat | 🇮🇩 Indonesia |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Allwetterzoo Münster | 🇩🇪 Germany | |
| 2 | Münster Zoo | 🇩🇪 Germany |
Possible
About 20% of wildlife watchers report a Coconut Tree Snake sighting in Daintree National Park on a given day, based on 37 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 17th most-seen of the 31 reptiles we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
March and December
In those months about 40% of wildlife watchers report a Coconut Tree Snake in Daintree National Park on a given day, against under 5% in June, the lowest month. Those are among Daintree National Park's wettest months, with about 320 mm of rain a month against 50 mm in September.
Between 3 and 6 am
Across all the parks we cover, that three-hour window holds the most Coconut Tree Snake sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is most active around dawn and dusk.
Yes
Of the 2 parks where we can rate Coconut Tree Snake sightings, Daintree National Park has the highest daily chance: about 20%. Next come Raja Ampat (Indonesia, about 20%).
GBIF citizen-science records
It is estimated from how often the Coconut Tree Snake is recorded against all the reptiles logged in Daintree National Park (37 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
