Drysdalia rhodogaster
Silhouette: SeismicShrimp · PhyloPic
In 3 days ~40% in a week ~70%
Drysdalia rhodogaster, also known as the mustard-bellied snake or Blue Mountains crowned snake, is a species of venomous snake endemic to Australia. The specific epithet rhodogaster ("red-bellied") refers to body colouration.
The snake grows to an average of about 40 cm in length. The upper body is brown to grey, with a darker head and a yellow to orange band over the nape. The species is viviparous, with an average litter size of five. Its diet consists mainly of lizards.
The species' distribution is limited to south-eastern New South Wales. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Blue Mountains National Park | 🇦🇺 Australia |
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Mustard-bellied Snake sighting in Blue Mountains National Park on a given day, based on 49 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 20th most-seen of the 44 reptiles we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
March
In that month about 30% of wildlife watchers report a Mustard-bellied Snake in Blue Mountains National Park on a given day, against under 5% in May and July–August, the lowest months. That is one of Blue Mountains National Park's wettest months, with about 150 mm of rain against 40 mm in May.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Mustard-bellied Snake sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Blue Mountains National Park, in our data
Blue Mountains National Park is the only park on Wallace's Line with enough records to rate Mustard-bellied Snake sightings: about 20% of wildlife watchers there report one on a given day.
Same family: Elapidae
The closest relatives of the Mustard-bellied Snake that you can see in Blue Mountains National Park (family Elapidae, Elapid Snakes) are Red-bellied Black Snake (about 30%), Highlands Copperhead (about 30%) and Eastern Tiger Snake (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Mustard-bellied Snake is recorded against all the reptiles logged in Blue Mountains National Park (49 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.
