Explanation of Pupil

Explanation of Pupil

Pupil

In Kentucky, the black part in the center of the eye (pupil) of harmless snakes is round. Venomous snakes have egg-shaped or cat-like (elliptical) pupils. 

Snake pupil shapes

Explanation of Head Shapes

Explanation of Head Shapes

Head Shape

Venomous snakes usually have a triangular (wide at the back and attached to a narrow neck) or 'spade-shaped' head. Be aware that many non-venomous snakes, such as watersnakes, flatten their heads when threatened and may be confused with venomous snakes.

Snake head shapes

Snake head shapes