Photo credit:

HERP.MX

Common name

Autlán Rattlesnake or Manantlán Long-tailed Rattlesnake

Scientific name

Crotalus lannomi

Conservation Status

ICUN - Data deficient, presumed to be extremely imperiled due to low number of specimens and restricted range

Federal and State Protections

Threatened/Amenazada (A) - (Mexico)

Countries of Occurrence

Mexico

Adult size

11in (30cm) - 24.4in (63cm)

States or Providence 

Jalisco & Colima

Counties

Autlán de Navarro* & Minatitlán

Species Description

This extremely rare species of rattlesnake is only known from just three locations in Jailisco and Colima states. However, there is suspicion the Jalisco specimen may have been found in Colima but erroneously labeled across the border in Autlán municipality.

It is restricted to the ecotones (ecosystem edges) between tropical deciduous forests and montane oak forests. It is currently threatened by mining activity and road mortality.

They are one of three "Long-tailed Rattlesnakes", notable for their proportionately long tails.

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