Common Name: 
Diamond-backed water snake

Scientific Name: 
Nerodia rhombifer

Identification: 18-65 in. Gray-brown or tan with dark gray or brown crossbands alternating on the back and sides; belly yellowish with small dark markings.  Scales keeled

Habits: Diamond-backed water snakes occur in and around lakes, ponds, marshes, swamps and larger streams and rivers, usually in low country.

Distribution: Throughout Louisiana, but uncommon in uplands.