Arizona Black Rattlesnake
Crotalus cerberus
A darkly colored montane rattlesnake of central Arizona known for its ability to darken further with age and altitude.
- Venomous?
- Venomous
- Adult length
- 0.7-1.2 m (2.3-4 ft)
- Range
- Mountainous central Arizona
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Overview
The Arizona Black Rattlesnake inhabits the mountainous, forested regions of central Arizona, often at higher elevations than many other rattlesnake species in the state. Its dark coloration provides camouflage among volcanic rock and forest litter.
Interestingly, individuals often darken considerably as they age, with adults sometimes appearing almost entirely black.
How to identify it
- Base color ranges from olive-brown to dark gray or nearly black in older adults
- Dorsal blotches often obscured by dark pigmentation in mature snakes
- Juveniles show more distinct blotched patterning that darkens with age
- Broad triangular head, elliptical pupils, heat-sensing pits
- Segmented rattle
- Distinguished from other Arizona rattlesnakes by overall dark coloration and montane range
Habitat & range
Found in mountainous terrain of central Arizona including pine-oak woodlands, chaparral, and rocky canyons at elevations often above 1,500 m (5,000 ft). Frequently associated with volcanic rock outcrops and forested slopes.
Behavior, diet & reproduction
Active by day in cooler mountain conditions, shifting toward crepuscular activity in warmer months. Preys on rodents, birds, and lizards. Gives birth to live young in late summer. Known for relatively calm temperament compared to some other rattlesnake species.
Frequently asked questions
Why does the Arizona Black Rattlesnake darken with age?
Melanism increases as the snake matures, likely aiding camouflage among dark volcanic rock and forest substrates in its montane habitat.
Where is it found?
In the mountainous regions of central Arizona, typically at higher elevations than many desert rattlesnakes.
Is it more docile than other rattlesnakes?
It is often described as having a comparatively calm temperament, though it should still be treated as venomous and given distance.
What habitat does it prefer?
Pine-oak woodlands, chaparral, and rocky canyon country at moderate to high elevations.
Arizona Black Rattlesnake guides
In-depth guides for identifying and understanding Arizona Black Rattlesnake.
