Pituophis catenifer affinis - Sonoran Gopher Snake

     1.  Rostral scale is sharple rounded in the front
     2.  Row of biconcave saddles, light anterior and darkening near the posterior and tail region
     3.  When feeling threatened will flatten the head, hiss loudly, and vibrate the tail rapidly

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• Leptotyphlopidae • Boidae • Viperidae • Colubridae • Elapidae •