Desert Massasauga

Sistrurus catenatus edwardsi

Venom Status:

Venomous

 

Characteristics:

In AZ this small (to about 18”) sand colored rattlesnake has darker dorsal blotches and 2 rows of alternating lateral spots. In its south Texas locale the pattern is the same but the snake is overall somewhat darker. Its light colored belly is devoid of most markings. There are 9 large plates on the top of the head. The rattle is fairly large and quite audible. Keeled scales in 23 rows. Note the vertical pupils and infrared sensing pit between, but lower than, the nostril and eye. Ovoviviparous. Neonates like adults in appearance

 

Unique Features:

The 9 large plates on the top of the head and the rattle will identify this little rattler. Also consult range maps

 

Habitat and Diet:

This snake is a grassland specialist. Prey items are small rodents, ground dwelling birds, amphibians, and lizards.

 

Geographic Range:

TX, AZ, CO, KS, NM, OK