Nile crocodile: It has 4 heart chambers, doesn't shed, Only reptile that care for it's young
Order Chelonians
Tortoise: on land, retracts it's head straight backwards
Turtle: sea water, does not retract its neck
Order squamata:
Snakes:
Python constricts its prey
Adders are cytotoxic
Black Mamba most dangerous snake in SA and quickest
Vine snakes is the only snake that doesn't have a anti-venom
Interesting facts:
They can go days without eating
Most snakes are not poisonous
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