Crotalus enyo furvus

Crotalus enyo furvus, also known as the Rosario rattlesnake or the dusky Baja California rattlesnake, is a subspecies of Baja California rattlesnake, a kind of venomous pit viper. It is named after the latin 'furvus' meaning 'dark complexion' or 'swarthy', referring to the colouration of the subspecies.^[1] It is found on the San Quentin Plain in Baja California del Norte - due to the area's restricted and largely inaccessible habitat not much is known about the subspecies.^[2]

Crotalus enyo furvus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Viperidae
Genus:	Crotalus
Species:	C. enyo
Subspecies:	C. e. furvus
Trinomial name
Crotalus enyo furvus Lowe & Norris, 1954

Description

Crotalus enyo furvus is usually dark to grey brown in colouring, with specific scales different sizes and in different positions to other C. enyo subspecies. Specifically, C. e. furvus is the only subspecies of the species to display subfoveal scales. They are also known to have an average length smaller than the other two subspecies.^[3]

Diet & behaviour

The Rosario rattlesnake is thought to eat mostly small mammals, using burrows to hunt and for shelter.^[2] It is known to be at least partly nocturnal.^[4]

Reproduction

The dusky Baja California rattlesnake is known to give birth to less than ten neonates in one brood.^[2]