Anacondas rarely appear far from water. Its range follows flood plains, swamp forests, slow rivers, and heavy tropical wetlands spread across northern and central South America.
Snakes are difficult to properly track because they spend long periods hiding under muddy water or dense vegetation, so population estimates change from one report to another. Even where they are common, sightings are infrequent.Most records are associated with the green anaconda, the largest species in the group. It is closely associated with the Amazon Basin, although smaller populations extend into adjacent wetland areas as well.
Geography plays a bigger role here than borders. River systems, seasonal flooding, and swampy conditions tend to determine where snakes remain active.
estimated Anaconda population by country
| Rank | nation | Estimated number of anacondas | Major habitat areas |
| 1 | Brazil | 400,000+ | Amazon rainforest, Pantanal wetlands |
| 2 | Venezuela | About 200,000 | Llanos floodplains and swampy river basins |
| 3 | Colombia | About 100,000 | Amazon Basin, Orinoco Wetlands |
| 4 | Bolivia | 70,000+ | Tropical swamps and eastern lowlands |
| 5 | Peru | 60,000+ | Amazon waterways and flooded forests |
| 6 | Ecuador | 30,000+ | Wetlands of eastern Amazonia |
| 7 | Paraguay | 25000+ | Wetlands and swamps associated with the Pantanal |
| 8 | Guyana | 15,000+ | Inland rainforest rivers |
| 9 | Suriname | 10,000+ | Swamp forests and tropical waterways |
| 10 | French Guiana | 8000+ | Coastal river basins and rainforest wetlands |
Countries with The largest population of anacondas
1. Brazil
Brazil is generally associated with the world’s largest anaconda population because much of the Amazon rainforest and Pantanal wetlands lie within its borders. Large snakes are regularly associated with flooded grasslands, forest rivers and remote swamps where human settlement is still limited.
2. Venezuela
Venezuela contains large areas of the Llanos floodplain, an area long associated with green anacondas. Monsoon rains turn large parts of the land into shallow wetlands where fish, birds and mammals live, on which snakes feed.
3. Colombia
Colombia supports anaconda populations mainly in lowland rainforests and eastern river basins associated with the Orinoco and Amazon systems. Encounters are more likely to be in isolated wetland areas than in densely populated areas.
4. Bolivia
Bolivia has large wetland habitats in its northern and eastern lowlands. Dense swampy areas and slow waterways create suitable shelter for anacondas, especially during the wet months when the floodplains expand.
5. Peru
Peru contains anacondas within its territory in the Amazon, especially around swamp forests and flooded jungle edges. Its range is concentrated in lowland rainforests rather than the mountainous regions of the west.
6. Ecuador
Ecuador has a smaller population associated with the country’s eastern Amazon region. Snakes are usually associated with remote waterways and wet forest wetlands close to river channels.
7. Paraguay
Paraguay lies within part of a broader wetland network connected to the Pantanal River and nearby river systems. Anacondas are found mainly in swamps and lowlands that are seasonally flooded.
8. Guyana
Guyana has tropical rainforest waterways where anacondas continue to survive in relatively calm habitats.
Most records come from inland areas with dense vegetation and permanent fresh water sources.
9. Suriname
Suriname supports anaconda populations across its swamp forests and remote river systems. Dense rainforest cover and humid lowlands provide suitable conditions for large water snakes.
10. French Guiana
French Guiana remains part of this species’ natural northern range due to its dense tropical forests and humid coastal river basins. Snakes are largely confined to isolated swampy habitats away from urban areas.