Mexican Lancehead Rattlesnake

Fascinating facts about the Mexican Lancehead Rattlesnake

• Most adults of this Mexican pit viper stretch just 60-70 cm (24-28 in), yet exceptionally large specimens may be as much as 100 cm (39 in).
• The snake’s home spans the central Mexican plateau from southern Zacatecas and northeastern Colima to east-central Veracruz.
• It lives between 1,450 and 2,600 m (4,760-8,530 ft) above sea level.
• Classified as “Least Concern” on the 2001 IUCN Red List, the species was noted as having a down-trending population in the 2007 assessment.
• The original type locality was listed simply as “Table Land, Mexico,” but a 1950 revision narrowed it to Tupátaro in Guanajuato, sharpening the geographic fingerprint scientists use to track this rattlesnake’s identity.

At a glance

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