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  3. Cascabel Rattlesnake

Reptiles · Squamata · Viperidae

Cascabel Rattlesnake

Crotalus durissus

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk.

Spotted something wrong?

The tropical rattlesnake, or cascabel, is a venomous species of rattlesnake distributed across Latin America: from Mexico to South America. It is the most widely distributed snake in its genus and it is highly venomous, its bite being a serious problem for medical treatment. Twelve subspecies are currently recognised, including the typical form.

Weight

1 kg – 4 kg

Size

1 m – 1.8 m

Life expectancy

20 years

Diet

Carnivore

Feeds mainly on other animals.

Activity

Irregular activity

Active at irregular times, by day or night depending on circumstances.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

SavannaDesertGrassland
17countries35parks22same family

Fun facts

  • It is the only rattlesnake in South America: the genus is essentially North American and this species crossed the Isthmus of Panama after it formed, colonising the savannahs of the south as far as Argentina.
  • Its venom is markedly neurotoxic, unlike that of the northern rattlesnakes, and contains crotoxin, a compound under investigation both as a painkiller and as an antitumour agent.
  • It occupies open, dry ground, and its recent spread in Brazil has followed deforestation: the conversion of rainforest into pasture has opened new territory for it.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (reptile)
Habitat and environment
Savannah, cerrado, dry scrub and grassland of Mexico, Central America and South America
Sexual maturity
3 years
Gestation / incubation
3.9 months
Litter / clutch size
6

Sources consulted: Wikipedia (es): Crotalus durissus

Where to find it

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Where to see it

Parks and dive sites where this species has been documented — showing 10 of 35.

Related species

Other species in the catalogue with the most in common with Cascabel Rattlesnake — same habitat, park, country, tags or family.

Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family

Keep exploring

Based on what we already know about cascabel rattlesnake.

Share an experience, a fun fact or a tip for seeing the cascabel rattlesnake.
See full glossary
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The pins mark the parks where its presence is documented.

See its range on the interactive map→
TalampayaArgentina
Ischigualasto (Valley of the Moon)Argentina
IberáArgentina
El PalmarArgentina
Pantanal MatogrossenseBrazil
Chapada DiamantinaBrazil
Lencois MaranhensesBrazil
TayronaColombia
Defensores del ChacoParaguay
CalileguaArgentina
See all 35 parks
JararacaLeast Concern

Jararaca

Bothrops jararaca

Least Concern

Eyelash Viper

Bothriechis schlegelii

South American BushmasterVulnerable

South American Bushmaster

Lachesis muta

Least Concern

Western Diamond-backed Rattlesnake

Crotalus atrox

Least Concern

Sidewinder

Crotalus cerastes

Least Concern

Mohave Rattlesnake

Crotalus scutulatus

CountriesArgentina
ParksTalampayaArgentina
TagsCarnivore
Carnivore
Nocturnal
Variable activity
Solitary
Reptile
Savanna
Desert
Grassland

South America9

North America8

Argentina
Brazil
Colombia
Costa Rica
Paraguay
Bolivia
Argentina
Bolivia
Brazil
Colombia
Guyana
Paraguay
Peru
Uruguay
Venezuela
Belize
Costa Rica
El Salvador
Guatemala
Honduras
Mexico
Nicaragua
Panama