Black-bellied Swamp Snake

Black-bellied Swamp Snake

Hemiaspis signata

Silhouette: SeismicShrimp · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
Daily sighting probability ~10% · With luck
at Royal National Park
7 Verified sightings at Royal National Park From 2019 to 2026
65 Verified sightings across all 6 parks From 2019 to 2026
May Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Black-bellied Swamp Snake

Hemiaspis signata (common names: black-bellied swamp snake and marsh snake) is a species of venomous elapid snake endemic to Australia, where it is found along the east coast. Recognisable by two distinctive narrow white lines on the face, the colour can range from pale olive to black top with a dark grey to black belly. Adults can grow to 70 cm in length, but most specimens are smaller than this. Their diet consists mainly of skinks and frogs.

It was first described in 1859 by Giorgio Jan as Alecto signata. Boulenger GA. 1896. Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the Colubridæ (Opisthoglyphæ and Proteroglyphæ)... London: Trustees of the British Museum (Natural History). (Taylor and Francis, printers). xiv + 727 pp. + Plates I-XXV. (Denisonia signata, pp. 338–339).

Jan G, Sordelli F. 1873. Iconographie générale des Ophidiens, Quarante-troisième livraison. Paris: Baillière. Index + Plates I-VI. (Alecto signata, Plate VI, figure 5). (in French). Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Lamington National Park 🇦🇺 Australia
~30%
2 Springbrook National Park 🇦🇺 Australia
~10%
3 Royal National Park 🇦🇺 Australia
~10%
4 Booderee National Park 🇦🇺 Australia
Insufficient data
5 Daintree National Park 🇦🇺 Australia
Insufficient data
6 Blue Mountains National Park 🇦🇺 Australia
Insufficient data

Quick answers

What are the chances of seeing a Black-bellied Swamp Snake in Royal National Park?

About 10% of wildlife watchers report a Black-bellied Swamp Snake sighting in Royal National Park, based on 7 verified sightings from GBIF citizen-science data.

When is the best time to see Black-bellied Swamp Snake in Royal National Park?

May has the highest sighting rate for Black-bellied Swamp Snake in Royal National Park in our monthly data.

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