Patagonian Racer
Philodryas trilineata
A hardy, cold-tolerant colubrid found in the arid steppes of Patagonia, unusually far south for a rear-fanged racer.
- Venomous?
- Mildly venomous
- Adult length
- 0.6-1.0 m (2-3.3 ft)
- Range
- Argentina and Chile, including Patagonia
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Overview
The Patagonian Racer is a resilient colubrid adapted to the cooler, arid conditions of Argentine and Chilean Patagonia, one of the southernmost ranges of any snake in South America. It belongs to the mildly venomous genus Philodryas.
Its ability to tolerate cooler climates sets it apart from most tropical relatives in the same genus, and it remains active during the relatively short warm season of the Patagonian steppe.
How to identify it
- Grayish-brown to olive dorsal coloration, often with three longitudinal stripes running the length of the body
- Pale cream or yellowish belly
- Slender, moderately sized body
- Round pupils and a narrow head
- Striping pattern helps distinguish it from other Philodryas species in the region
Habitat & range
Inhabits arid steppe, scrubland, and semi-desert habitats across Patagonia in Argentina and Chile, tolerating cooler temperatures than most related species.
Behavior, diet & reproduction
Diurnal, active during the warmer parts of the day in its cool climate range. Feeds on lizards and small mammals, using mild venom from rear fangs to subdue prey. Likely enters a period of reduced activity or brumation during the cold Patagonian winter. Egg-laying species.
Frequently asked questions
Where does the Patagonian Racer live?
In the arid steppes and scrublands of Patagonia in Argentina and Chile.
Is it venomous?
It is mildly venomous with rear fangs, primarily used on prey, and not a threat to humans.
What makes it unusual among its relatives?
It tolerates a much cooler climate than most other Philodryas species, living at the southern edge of snake distribution in South America.
What does it eat?
Lizards and small mammals.
Patagonian Racer guides
In-depth guides for identifying and understanding Patagonian Racer.
