Crotalus enyo Cope, 1861

Maximum Size

Crotalus enyo Cope, 1861 has a maximum reported total length of 89.8 cm (35.4 in). This species shows sexual dimorphism, with males typically growing larger than females.

Head and Eye Morphology

It has a distinctly small, narrow head, and proportionately large eyes.

General Distribution Range

This species ranges across western Mexico.

Baja California Peninsula Distribution

On the Baja California Peninsula, its territory extends from around Río San Telmo on the west coast, and from opposite Isla Angel de la Guarda on the gulf coast, south all the way to Cabo San Lucas.

Gulf of California Island Distribution

It also occurs on multiple Gulf of California islands: San Marcos, Carmen, San José, San Francisco, Partida del Sur, Espírita Santo, and Cerralvo.

Pacific Coast Island Distribution

Additionally, it can be found on the Pacific coast island of San Margarita.

Type Locality

The species' type locality is Cape San Lucas, Baja California Sur.

Primary Habitat Preference

Crotalus enyo generally prefers desert habitats.

Northwestern Range Habitat

In the northwestern portion of its range, it can also live in chaparral.

Sierra de San Lázaro Habitat

In the cape region of the Sierra de San Lázaro, it inhabits pine-oak forest and tropical deciduous forest.

Microhabitat Associations

It is often found in rocky areas with arid thorn scrub and cacti, but occasionally occurs in sand dunes as well.

Human Settlement Occurrence

It is frequently drawn to human settlements, where it has been recorded in refuse piles.

Captive Litter Size

Captive individuals of this species give birth to litters of two to seven young.

Newborn Length Range

Recorded newborn lengths range from 20.6 to 22.2 cm (8.1 to 8.7 in).

Wild Neonate Observation Period

Grismer (2002) documented wild neonates between late July and mid October.

Reproductive Timing Inference

This timing suggests the species mates in spring, and gives birth in summer or early fall.