Snake Identifier
Yellow-bellied Liophis (Erythrolamprus poecilogyrus)
Culebra de Penarol (Liophis poecilogyrus), 2016 by Enrique González, via Wikimedia Commons, licensed under CC BY 4.0
Colubrids

Yellow-bellied Liophis

Erythrolamprus poecilogyrus

A widespread South American colubrid with a bright yellow belly, often found near wetlands and grasslands.

Venomous?
Mildly venomous
Adult length
0.5-0.9 m (1.5-3 ft)
Range
Central and South America, including Brazil, Paraguay, and Argentina

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Overview

The yellow-bellied Liophis, now generally placed in the genus Erythrolamprus, is a common and adaptable snake found across a large portion of South America, from grasslands to marshy lowlands. Its bright ventral coloration makes it easy to distinguish when seen from below.

It is a rear-fanged species with mild venom used on small prey, posing little to no risk to humans.

How to identify it

  • Olive, brown, or grayish dorsal coloration, sometimes with faint striping
  • Bright yellow to orange belly, giving the species its common name
  • Slender build with a moderately sized head
  • Round pupils
  • Distinguished from similar ground snakes by its vivid yellow underside

Habitat & range

Found in grasslands, marshes, wet meadows, and areas near ponds and streams across much of central and southern South America.

Behavior, diet & reproduction

Diurnal and terrestrial, often found near water where it hunts frogs and toads. Also active in grassy and disturbed habitats. Egg-laying.

Frequently asked questions

Is the yellow-bellied Liophis dangerous?

No, it is only mildly venomous and not a threat to humans.

Why does it have a yellow belly?

Its bright yellow ventral coloration is a distinguishing natural feature, though its exact function is not fully understood.

Where does it live?

It occurs across central and southern South America, favoring wetlands and grasslands.

What does it eat?

It feeds mainly on frogs and toads.