Rosy Boa
Lichanura trivirgata • Order: Squamata, Suborder: Serpentes, Family: Boidae, Subfamily: Erycinae, Genus: Lichanura, Species: L. trivirgata
Venomous Status
Non-venomous
Danger Level
Harmless; these snakes are very docile, rarely bite humans, and lack venom or large teeth.
Geographic Range
Southwestern United States (California, Arizona) and northwestern Mexico (Baja California, Sonora).
Conservation Status
IUCN Least Concern. Primary threats include habitat fragmentation and poaching for the illegal pet trade.
Physical Description
Heavy-bodied with smooth, shiny scales. This specimen shows a uniform greyish-brown coloration, though they typically feature three longitudinal dark stripes. The head is slightly distinct from the neck, with a blunt snout and small eyes with vertical pupils.
Size & Dimensions
Specimen appears to be an adult around 60-80 cm. Typical species range is 43-112 cm (17-44 inches).
Habitat
Arid and semi-arid desert environments, particularly rocky canyons, hillsides, and scrublands with accessible crevices for shelter; sea level to approximately 1,400 meters.
Behavior & Temperament
Slow-moving and extremely docile. Generally nocturnal or crepuscular to avoid desert heat. When threatened, they roll into a tight ball with the head protected in the center.
Diet & Feeding
Primarily small mammals (rodents) and occasionally birds or lizards. They are constrictors that use ambush or active searching in rock crevices.
Reproduction
Viviparous (gives birth to live young) rather than laying eggs. Typical litter size is 2-10 neonates born in late summer or autumn.
Venom Profile
Venom Type
Non-venomous - no medically significant venom.
AI-generated — see a qualified source if acting on this. For any snakebite, call emergency services immediately.
Look-alikes
Coastal Rosy Boa (Lichanura orcutti) which was previously considered the same species; Rubber Boas (Charina bottae) which have more uniform color and even blunter tails; and various King Snakes.
Conservation Status
IUCN Least Concern. Primary threats include habitat fragmentation and poaching for the illegal pet trade.
Cultural Significance
Highly popular in the herpetocultural trade due to their calm nature and varied color morphs. They play a vital ecological role in controlling desert rodent populations.
Notable Features
One of only two species of boas native to the United States. They have a remarkable ability to tolerate extreme temperature fluctuations in the desert through behavioral thermoregulation.