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Lizards are good climbers and fast runners, and usually live in trees. Some can change their skin color to mimic their surroundings.

Lizard

Lizards are good climbers and fast runners, and usually live in trees. Some can change their skin color…

Dissection of head of rattlesnake; showing fangs (f) and poison sac (p).

Rattlesnake

Dissection of head of rattlesnake; showing fangs (f) and poison sac (p).

Structure of internal anatomy of a snake.

Snake

Structure of internal anatomy of a snake.

Snakes belong to the group known as Squamata.

Snake

Snakes belong to the group known as Squamata.