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Sculptures by Phyllis Bone


Thermoregulation |  Skulls
Crocodiles |  Snakes |  Turtles |  Lizards |  Tuatara
Reptiles are either oviparous or viviparous in their mode of reproduction
Oviparous(egg laying):

Oviparous reptiles lay amniotic eggs. Amniotic eggs have a hard shell which protects the embryo, and a special membrane to prevent the embryo from drying out.

Turtles, crocodiles, and tuatara are all oviparous as are some species of lizard and snake.

Crocodile egg

Preserved life cycle of a viviparous lizard (Lacerta vivipara)
Viviparous (live bearing):

Viviparous reptiles give birth to live young.
Some snake and lizard species are viviparous