South American Rattlesnake
Crotalus durissus
A widespread rattlesnake of South American savannas and open habitats.
- Adult length
- 1.2-1.8 m (4-6 ft)
- Range
- South America, including savannas of Brazil, Venezuela, and neighboring countries
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Overview
The South American Rattlesnake, also called the cascabel, is the most widespread rattlesnake of South America, occupying open grassland and savanna habitats across a broad range that includes Brazil, Venezuela, Colombia, and Argentina.
How to identify it
- Background color tan, brown, or grayish
- Distinct diamond-shaped or rhombic dorsal blotches with lighter borders
- A pair of prominent dark stripes running down the neck onto the body
- Broad triangular head, elliptical pupils, heat-sensing pits
- Segmented rattle
- Distinguished from other South American vipers by its rattle and neck stripes
Habitat & range
Found in open savannas, grasslands, cerrado, and dry scrub habitats across much of South America. Avoids dense rainforest, preferring open or disturbed terrain, including agricultural land at times.
Behavior, diet & reproduction
Primarily nocturnal and crepuscular, especially in warm lowland regions. Feeds on small mammals, birds, and occasionally lizards. Reproduces via live birth, with sizeable litters. Generally relies on rattling and camouflage.
Frequently asked questions
Where is it found?
Across open savanna and grassland habitats in much of South America, including Brazil, Venezuela, Colombia, and Argentina.
What habitat does it avoid?
It generally avoids dense rainforest, preferring open or semi-open terrain.
How can it be identified?
By its diamond-shaped dorsal blotches, prominent neck stripes, and segmented rattle.
South American Rattlesnake guides
In-depth guides for identifying and understanding South American Rattlesnake.
South American Rattlesnake identified by the community
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