Sonoran Lyre Snake
Trimorphodon lambda
- Least concern
- Card rarity: Common
- Reptiles

Trimorphodon lambda, the Sonoran lyre snake, is a species of rear-fanged snake in the family Colubridae. Native to the southwestern United States and northwestern Mexico, the species is best known for the distinctive V-shaped or lyre-like marking on the top of its head. Previously classified as a subspecies of the western lyre snake, it is now widely recognized as a distinct species.
Classification
- Class
- Reptilia
- Order
- Squamata
- Family
- Colubridae
- Genus
- Trimorphodon