The queen of the wetland among the reptiles. A semi-aquatic constrictor boa of diurnal and crepuscular habits, famous for its beautiful pattern of black and ochre-yellowish blotches that give it perfect camouflage among the floating water hyacinths and the water. Non-venomous: it kills its prey by constriction. Females are notably larger and bulkier than males. An ovoviviparous species: it gives birth to fully formed young, it does not lay eggs. Vulnerable at the national level in Argentina. Length: 2.5 to 4 m (exceptionally more than 4.5 m). Weight: 25 to 35 kg, with records of more than 40.
Behaviour
An ambush hunter. It captures its prey by surprise in the water or at the shores. An opportunistic carnivorous diet: waterbirds such as grebes and herons, young caimans and capybaras, and fish. In the cold months it comes out of the water to bask in the sun.
How and when to see it
It can be seen year round, but it is in the cold months, when it comes out of the water to bask, that it is easiest to spot.
Where to see it in the Iberá
The gateways of the Great Iberá Park where yellow anaconda has confirmed presence:
Tours to see it
Verified providers operating at the gateways where yellow anaconda lives. You contact them directly on WhatsApp from the app.
- Esteros Ñe’é
Experiences with local storytelling and a cultural take on the marshes.★ 5.0 - Gaucho Argentino
Horseback journeys across a network of refuges in Iberá. Multi-day rides with overnight…★ 5.0 - Irupé Excursiones
Guided hiking. Guided visit to museums, historic sites, chapels and trails of the town…★ 5.0 - Reserva Estero Camba Trapo
Private nature reserve of Ecoposada del Estero, on the Camba Trapo road. One of the…★ 5.0
Species profile
- Common nameYellow Anaconda
- Scientific nameEunectes notaeus
- GroupReptile
- StatusNative
- ConservationVulnerable in Argentina (national conservation status: AHA, 2012).
Conservation: national status published by the SIB (Argentine National Parks).
Other species of the Iberá
Discover all the wildlife of the Iberá
More than 250 species with photos, profiles and the gateways where you can see them. Map, providers and trip planner. Free, on the web and on Google Play.
Open Iberá Experience