Acrantophis madagascariensis
Silhouette: Alex Slavenko · PhyloPic
In 3 days ~90% in a week >90%
Acrantophis madagascariensis is a species of boid snake in the subfamily Sanziniinae that is endemic to the island of Madagascar. Its common names include the Madagascar ground boa and Malagasy ground boa. This species is included in the Boidae family of snakes, subfamily Sanziniinae. No subspecies are currently recognized.
Adult females can be up to 3 m (10 ft), males are typically smaller, the average size of the population is 2.4 m (8 ft) in length. This is the largest snake species found on the island of Madagascar. Acrantophis madagascariensis, like others in the family, dispatch their prey by constriction.
The color pattern consists of a pale reddish-brown ground color mixed with gray, overlaid with a pattern of dorsal rhombs outlined with black or brown. Sometimes, this creates a vague zigzag impression. The sides are patterned with a series of black ovoid markings with reddish blotches, often bordered or centered with white.
A. madagascariensis is endemic to Madagascar, occurring in the central, northern and western parts of the island. The species usually occurs in sparse, open woodland, such as the Madagascar dry deciduous... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Ankarafantsika National Park | 🇲🇬 Madagascar |
More parks will be added in future updates.
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | San Diego Zoo | 🇺🇸 United States | |
| 2 | Antwerp Zoo | 🇧🇪 Belgium | |
| 3 | Paris Zoological Park | 🇫🇷 France | |
| 4 | Zoo Pilsen | 🇨🇿 Czechia | |
| 5 | Abilene Zoological Gardens | 🇺🇸 United States | |
| 6 | Aquarium du palais de la Porte Dorée | 🇫🇷 France | |
| 7 | Bronx Zoo | 🇺🇸 United States | |
| 8 | Zoo La Barben | 🇫🇷 France | |
| 9 | Berlin Zoological Garden | 🇩🇪 Germany | |
| 10 | Wrocław Zoological Garden | 🇵🇱 Poland | |
| 11 | Zoo Knoxville | 🇺🇸 United States | |
| 12 | ABQ BioPark Zoo | 🇺🇸 United States | |
| 13 | Philadelphia Zoo | 🇺🇸 United States | |
| 14 | bioparco | 🇮🇹 Italy | |
| 15 | Salzburg Zoo | 🇦🇹 Austria | |
| 16 | National Zoological Gardens of Sri Lanka | 🇱🇰 Sri Lanka | |
| 17 | The Abilene Zoo | 🇺🇸 United States | |
| 18 | Leningrad Zoo | 🇷🇺 Russia | |
| 19 | Cherkasy Zoo | 🇺🇦 Ukraine | |
| 20 | Mandraka Reptile Farm | 🇲🇬 Madagascar | |
| 21 | Randers Tropical Zoo | 🇩🇰 Denmark | |
| 22 | Africarium | 🇵🇱 Poland | |
| 23 | Aquarium Berlin | 🇩🇪 Germany | |
| 24 | Aquatopia | 🇧🇪 Belgium | |
| 25 | terrarium ogrodu zoologicznego we Wrocławiu | 🇵🇱 Poland |
Likely
About 50% of wildlife watchers report a Madagascar Ground Boa sighting in Ankarafantsika National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 8th most-seen of the 20 reptiles we can rate there. Over three days the chance rises to about 90%, and over a week to over 90%, if each day is a fresh chance.
April
In that month about 80% of wildlife watchers report a Madagascar Ground Boa in Ankarafantsika National Park on a given day, against about 10% in June, August–September and December, the lowest months. That is one of Ankarafantsika National Park's driest months, with about 55 mm of rain against 560 mm in January. February and March have too few records to rate.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Madagascar Ground Boa sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Ankarafantsika National Park, in our data
Ankarafantsika National Park is the only park on Wallace's Line with enough records to rate Madagascar Ground Boa sightings: about 50% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Madagascar Ground Boa is recorded against all the reptiles logged in Ankarafantsika National Park (15 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.
