As the weather gets warmer, snakes will begin to appear. In Louisiana, there are seven venomous snake species. What they are and how to identify them.

They also tend to have pupils that open more widely in low light ... (Interestingly, different animals have different color tapeta, a fact that can aid in nighttime animal identification.) ...

The part that we can see is only just the front. That coloured circle is called the iris and the black spot in the middle is the pupil. This is the part of the eye that lets the light in.

This species' colors range from a light tan ... and slender with blunt heads that are solid black until just behind the eyes, and they have rounded pupils. Coral snakes are often colored with ...

pupils, fangs, rattles, neck size, tail scales, as well as color and pattern. Timber rattlesnakes, also called "canebrake" rattlesnakes, can be distinguished by a black chevron, or "V" pattern ...