Mexican Lance-headed Rattlesnake
Crotalus polystictus
A small rattlesnake of the central Mexican plateau notable for its distinctly narrow, lance-shaped head compared to most rattlesnakes.
- Venomous?
- Venomous
- Adult length
- 0.6-0.9 m (2-3 ft)
- Range
- Central Mexican highlands
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Overview
The Mexican Lance-headed Rattlesnake inhabits the high plateau and grassland regions of central Mexico. It is named for its unusually narrow, elongated head shape, which is less broadly triangular than that of most rattlesnake species.
It is a relatively small species found in agricultural and grassland habitats at moderate to high elevations on the Mexican plateau.
How to identify it
- Head noticeably narrower and more elongated than typical rattlesnakes, giving a lance-like appearance
- Background color tan, brown, or grayish
- Large, oval to rectangular dark blotches down the back
- Elliptical pupils and heat-sensing pits present
- Segmented rattle
- Distinguished from other Mexican rattlesnakes chiefly by its narrow head shape
Habitat & range
Found on the central Mexican plateau in grassland, agricultural fields, and open scrub habitat, typically at elevations between 1,500 and 2,600 m (5,000-8,500 ft).
Behavior, diet & reproduction
Active during cooler parts of the day and at dusk. Feeds primarily on small rodents found in grassland and agricultural settings. Reproduces via live birth. Generally considered a secretive species with a mild disposition compared to some other rattlesnakes.
Frequently asked questions
Why is it called the lance-headed rattlesnake?
Its head is notably narrower and more elongated than the broad triangular heads typical of most rattlesnakes, resembling a lance shape.
Where does it live?
On the high central plateau of Mexico, in grassland and agricultural habitats.
How big does it get?
It is a relatively small rattlesnake, typically 0.6-0.9 m (2-3 ft) in length.
What does it eat?
Primarily small rodents found in its grassland and farmland habitat.
Mexican Lance-headed Rattlesnake guides
In-depth guides for identifying and understanding Mexican Lance-headed Rattlesnake.
