Completed
Anaconda
Eunectes murinus
Silhouette: Gamma 124 · PhyloPic
- KingdomAnimalia (Animals)
- PhylumChordata (Chordates)
- ClassSquamata
- FamilyBoidae (Boas)
- GenusEunectes (Anacondas)
- SpeciesEunectes murinus (Anaconda)
In 3 days ~70% in a week ~90%
54 Verified sightings at Yasuní National Park From 2019 to 2026
151 In all 3 parks
November Best month
☀️ Diurnal When it's spotted
About the Anaconda
The green anaconda (Eunectes murinus), common anaconda, common water boa, akayima, or sucuri, is a boa species found in South America. It is one of the longest and heaviest known extant snake species. Like all boas, it is a non-venomous constrictor. Green anacondas generally have a life expectancy of 10 years in the wild, although some specimens live longer when they are taken care of in captivity. Green anacondas live in tropical rainforests and tend to prefer shallow, slow-moving waters, such as streams, rivers and flooded grasslands. They spend most of their time in the water but are also found on land in thick vegetation.
In the famous 10th edition of Systema Naturae of 1758, Carl Linnaeus cited descriptions by Albertus Seba and by Laurens Theodorus Gronovius to erect the distinct species murina of his new genus Boa, which contained eight other species, including Boa constrictor. The generic name Boa came from an ancient Latin word for a type of large snake. The first specimens of Boa murina were of immature individuals from 75 to 90 cm (2.5 to 3.0 ft) in length. In 1830, Johann Georg Wagler erected the separate genus Eunectes for Linnaeus's Boa murina after more... Wikipedia →
Recent sightings of Anaconda in Yasuní National Park
LIVEiNaturalistGlobal Distribution
Parks Where Found
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cuyabeno Wildlife Reserve | 🇪🇨 Ecuador | |
| 2 | Yasuní National Park | 🇪🇨 Ecuador | |
| 3 | Tambopata National Reserve | 🇵🇪 Peru |
Cities Where Found
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Salvador | 🇧🇷 Brazil |
Zoos & Centres Where Found
Closest Relatives at Yasuní National Park
Before you go
What are the chances of seeing an Anaconda in Yasuní National Park?
Possible
About 30% of wildlife watchers report an Anaconda sighting in Yasuní National Park on a given day, based on 54 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 8th most-seen of the 49 reptiles we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
When is the best time to see an Anaconda in Yasuní National Park?
April and November
In those months about 50% of wildlife watchers report an Anaconda in Yasuní National Park on a given day, against about 20% in May–June and September, the lowest months.
What time of day is best to see an Anaconda?
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Anaconda sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Is Yasuní National Park the best place to see an Anaconda?
2nd of 3
Of the 3 parks where we can rate Anaconda sightings, Yasuní National Park ranks 2nd at about 30%. The best odds are in Cuyabeno Wildlife Reserve (Ecuador, about 60%).
Which relatives of the Anaconda live in Yasuní National Park?
Same family: Boidae
The closest relatives of the Anaconda that you can see in Yasuní National Park (family Boidae, Boas) are Western Rainbow Boa (about 20%), Garden Tree Boa (about 20%) and Boa Constrictor (about 20%), with each one's daily chance of a sighting.
Where does the Anaconda sighting chance come from?
GBIF citizen-science records
It is estimated from how often the Anaconda is recorded against all the reptiles logged in Yasuní National Park (54 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.
