Giant Madagascan Hognose Snake

Giant Madagascan Hognose Snake

Leioheterodon madagascariensis

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
Insufficient data
overall probability at Ranomafana National Park
1 Verified records at Ranomafana National Park
☀️ Diurnal When it's active during daytime hours (6am–6pm)

Leioheterodon madagascariensis, the Malagasy, Madagascar or Madagascan giant hognose (snake), is a harmless species of pseudoxyrhophiid snake endemic to the island nation of Madagascar. The species is also found on the country's smaller islands of Nosy Be, Nosy Mangabe, and Nosy Sakatia, as well as on the Comoros archipelago, in the Mozambique Channel. It is thought, by some, to have been introduced to the Grande Comoro. Mature giant hognose snakes can measure between 130 and 180 cm (4 ft. to nearly 6 ft., or between 1-2 meters) in length, and be roughly the thickness of an average adult human's arm. Similarly to the Heterodon or Lystrophis genera of new-world hognoses, the Madagascar giant hognose, when threatened, will raise its head, open its mouth and inflate the skin around its neck and chin, superficially mimicking a cobra (or even a bearded dragon) in defensive posture, in an attempt to look larger and more intimidating. Wikipedia →

📅 Monthly Probability

📊

Fewer than 5 records of Giant Madagascan Hognose Snake at Ranomafana National Park — not enough to chart months honestly.

☀️ When They're Spotted

Most active during daytime hours (6am–6pm) · across all parks (global)

☀️Diurnal
☀️🌙🌙12am6am12pm6pm12am

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Probability
1 Ankarafantsika National Park 🇲🇬 Madagascar
70–80%
2 Ranomafana National Park 🇲🇬 Madagascar
Insufficient data
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