Creatures in Crisis
Photograph of Crotalus pusillus (Crotalus pusillus), recorded as Endangered
Crotalus pusillus (Crotalus pusillus). Image via Wikimedia Commons.

Endangered

Crotalus pusillus

Crotalus pusillus

Crotalus pusillus, or the Tancitaran Dusky Rattlesnake, is a venomous pit viper species found in west-central Mexico.

Status
Endangered
Scientific name
Crotalus pusillus
Taxonomy
Squamata · Viperidae · Crotalus

The viper

Adult males may grow to more than 50 cm (20 in) in length, while females are smaller. The largest recorded length for a specimen was 68.2 cm (26.9 in).

Range and habitat

It is found in west-central Mexico in the Sierra de Coalcomán of southwestern Michoacán, the Transverse Volcanic Cordillera of west-central Michoacán, and in adjacent Jalisco. It is probably also found in northeastern Colima. It occurs at elevations between 1,525 and 2,380 metres (5,003 and 7,808 ft).

Pins are Wikidata “endemic to” fields. Orange dots, when present, are GBIF occurrence tiles — survey bias included.

In crisis

This species is classified as Endangered on the IUCN Red List of Threatened Species. The population trend was unknown when assessed in 2007.

Crotalus pusillus is Endangered on this catalog because that is the IUCN category stored on Wikidata. Confirm the official criteria and any later count on iucnredlist.org.

Sources

Written for this catalog from the English Wikipedia article on Crotalus pusillus, Wikidata item Q146494. Family and order context is original field-guide writing about the group, not a copied assessment of this one species. Wikipedia text is CC BY-SA. Not an IUCN assessment. Counts, when quoted, can change — confirm them on the recovery programme and on iucnredlist.org.

Photograph via Wikimedia Commons. Wikipedia · Wikidata · IUCN Red List.

Same genus

Photograph of Crotalus catalinensis (Crotalus catalinensis), recorded as Critically EndangeredCR

Crotalus catalinensis

Crotalus catalinensis
Photograph of Vaquita (Phocoena sinus), recorded as Critically EndangeredCR

Vaquita

Phocoena sinus
Photograph of Javan rhinoceros (Rhinoceros sondaicus), recorded as Critically EndangeredCR

Javan rhinoceros

Rhinoceros sondaicus
Photograph of Sumatran orangutan (Pongo abelii), recorded as Critically EndangeredCR

Sumatran orangutan

Pongo abelii

Quick answers

What is Crotalus pusillus?
Crotalus pusillus, or the Tancitaran Dusky Rattlesnake, is a venomous pit viper species found in west-central Mexico.
What is the conservation status of Crotalus pusillus?
Endangered, as the IUCN category stored on Wikidata for Crotalus pusillus. Confirm the official assessment on iucnredlist.org.
Where does Crotalus pusillus live?
It is found in west-central Mexico in the Sierra de Coalcomán of southwestern Michoacán, the Transverse Volcanic Cordillera of west-central Michoacán, and in adjacent Jalisco.
Why is Crotalus pusillus in crisis?
This species is classified as Endangered on the IUCN Red List of Threatened Species.
Is this the IUCN Red List page for Crotalus pusillus?
No. This is a researched catalog account. The Red List is the assessment.
Is Crotalus pusillus a pet?
An animal on this catalog is in crisis in the wild. Keeping one is usually the wrong question.