South American Rattlesnake
Crotalus durissus • Order: Squamata, Suborder: Serpentes, Family: Viperidae, Subfamily: Crotalinae, Genus: Crotalus, Species: C. durissus
South America, primarily found in countries such as Brazil, Argentina, Venezuela, Colombia, Guyana, and Paraguay, typically inhabiting savannas, open grasslands, and arid regions.
Look up South American Rattlesnake in the Snake Encyclopedia →Family
Order: Squamata, Suborder: Serpentes, Family: Viperidae, Subfamily: Crotalinae, Genus: Crotalus, Species: C. durissus
Conservation
Least Concern according to the IUCN Red List, though local populations face threats from habitat destruction, agricultural expansion, and direct persecution.
Physical Description
Features a distinct diamond-shaped or chevron-like dorsal pattern bordered by lighter scales, a heavy-bodied build, keeled scales, and a pronounced rattle at the tail tip. The head is broad and distinct from the neck.
Size & Dimensions
Specimens typically range from 100 to 150 cm in total length, with exceptional individuals growing larger. The animal in the image appears to be an adult of medium size, compactly coiled.
Habitat
Favors open, dry, and arid habitats including savannas (cerrado), caatinga, open scrublands, and agricultural fields. It avoids dense rainforests and high-altitude mountain ranges.
Diet & Feeding
Primarily preys on small mammals such as rodents, as well as birds and occasionally lizards, using an ambush hunting strategy.
Reproduction
Viviparous, giving birth to live young. Females typically produce litters ranging from several to over a dozen offspring during the reproductive season.
Conservation Status
Least Concern according to the IUCN Red List, though local populations face threats from habitat destruction, agricultural expansion, and direct persecution.
Cultural Significance
Plays an important role in the ecosystems of South America by controlling rodent populations, and features in local folklore and indigenous cultures.
Notable Features
Equipped with a prominent rattle at the tip of the tail composed of keratin segments used to produce a buzzing warning sound when disturbed, and heat-sensing pits located between the eye and nostril.