Classification
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All Names

  • English
    • Blacktail Rattlesnake
    • Black-tailed Rattlesnake
    • Black Tailed Rattlesnake
  • German
    • Schwarzschwanz-Klapperschlange
  • Scientific Names
    • Crotalus molossus
    • Crotalus ornatus
  • Seri
    • cocázni
    • sayahuqui
  • Tarahumara
    • sayahuki
  • Spanish
    • Cascabel de cola negra

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Recent observations

Photos / Sounds

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What

Black-tailed Rattlesnake Crotalus molossus

Observer

tom79848

Date

June 30, 2016 11:18 PM CDT

Photos / Sounds

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What

Black-tailed Rattlesnake Crotalus molossus

Observer

tjsonger16

Date

June 29, 2016 10:39 PM EDT

Photos / Sounds

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What

Black-tailed Rattlesnake Crotalus molossus

Observer

kucycads

Date

June 25, 2016

Place

(Somewhere...)

Description

DOR, salvaged for TNHC
70F

Photos / Sounds

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What

Black-tailed Rattlesnake Crotalus molossus

Observer

langaha

Date

June 1, 2016 09:48 PM CDT

Description

76F

Photos / Sounds

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What

Black-tailed Rattlesnake Crotalus molossus

Observer

langaha

Date

May 29, 2016 09:21 PM CDT

Photos / Sounds

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What

Black-tailed Rattlesnake Crotalus molossus

Observer

tom79848

Date

June 27, 2016 12:12 AM CDT

Photos / Sounds

What

Black-tailed Rattlesnake Crotalus molossus

Observer

fatbaldguy21

Date

September 24, 2014 11:38 AM CDT

Photos / Sounds

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What

Mexican black-tailed Rattlesnake Crotalus molossus ssp. nigrescens

Observer

aop79

Date

June 1, 2016 06:10 PM CDT

Place

(Somewhere...)

Photos / Sounds

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What

Mexican black-tailed Rattlesnake Crotalus molossus ssp. nigrescens

Observer

aop79

Date

June 1, 2016 06:21 PM CDT

Place

(Somewhere...)

Photos / Sounds

What

Northern Black-tailed Rattlesnake Crotalus molossus ssp. molossus

Observer

agnishino

Date

June 16, 2016

Place

(Somewhere...)

Description

Cascabel de cola negra norteña (Crotalus molossus molossus), registrada en el APFF Campo Verde en el estado de Chihuahua.
Esta víbora es de tamaño medio a grande (710-1370 mm) de color café-grisáceo con "diamantes" en el dorso formados por escamas (completas) de color crema-beige, en la cabeza presenta unas lineas del mismo color que contrastas con la coloración obscura, aunque el rasgo distintivo de esta especie es la cola negra anterior al cascabel.
Habita terrenos rocosos en bosques, praderas y desiertos entre los 700-2300 m/nm, su actividad es predominantemente diurna debido a los climas templados dende habita, se le ha observado que trepa árboles para asolearse o buscar alimento compuesto principalmente por roedores y aves.
La camada varía entre 3-16 crías que nacen entre julio y agosto y aunque como cualquier cascabel puede ser peligrosa y mortal no exhibe una conducta agresiva.
Especie listada en la NOM-059-SEMARNAT-2010 como Sujeta a Protección Especial (Pr).

Photos / Sounds

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What

Black-tailed Rattlesnake Crotalus molossus

Observer

connor22

Date

June 12, 2016

Photos / Sounds

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What

Black-tailed Rattlesnake Crotalus molossus

Observer

dneuharth

Date

June 12, 2016
View all observations

Description from Wikipedia

Crotalus molossus is a venomous pit viper species found in the southwestern United States and Mexico. Four subspecies are currently recognized, including the nominate subspecies described here.

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Conservation Summary

  • Mexico
    Sujeta a protección especial (Pr) (Source: Norma Oficial 059)
Source: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.4. http://www.iucnredlist.org/technical-documents/spatial-data. Downloaded March 2011.
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