Reptiles
Yellow Anaconda
Eunectes notaeus
Gliding through wetlands across Paraguay, Bolivia, and northern Argentina, a yellow anaconda subdues prey through powerful constriction rather than venom, ranking among the largest snake species found anywhere in South America.
Overview
The yellow anaconda, Eunectes notaeus, is a Least Concern reptile native to wetland and grassland habitat across Paraguay, Bolivia, and northern Argentina. Its powerful constricting hunting style, its highly aquatic lifestyle, and its live-bearing reproduction make it one of the more physically formidable and ecologically significant snake species found anywhere in South America.
A hunter that squeezes rather than strikes
Rather than relying on venom like many other large snakes, the yellow anaconda instead overpowers prey entirely through constriction, its powerful body wrapping tighter with every breath its victim exhales until the struggle ends.
Status
Least Concern, remaining widespread and generally stable across suitable wetland habitat throughout Paraguay, Bolivia, and northern Argentina.
Yellow Anaconda: common questions
How does the yellow anaconda kill its prey?
This species kills prey through constriction, wrapping its powerful body around a victim and tightening with each exhaled breath rather than relying on venom.
How big does the yellow anaconda get?
This species is one of the largest snake species found in South America, though it is smaller on average than its close relative the green anaconda.
Does the yellow anaconda lay eggs?
No, this species gives birth to live young rather than laying eggs, with females capable of producing large litters.
Is the yellow anaconda a good swimmer?
Yes, this species is highly aquatic, spending much of its time in water and swimming with ease using a laterally flattened tail.