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Re: 01.09.2015-21:31:27
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Re[2]: 01.09.2015-21:31:27
Oviparous
: Most snakes (about 70% of them) are oviparous, which means they lay eggs. The eggs must then be incubated, or kept warm, until the hatchlings are ready to emerge from the shell. Nearly all members of the Colubridae family lay eggs. This includes rat snakes, grass snakes, kingsnakes and other "common" species. Cobras, mambas, adders, and most other members of the Elapidae family fall into this category as well.
Viviparous
: This is when there is no egg at all. Snakes that are viviparous nourish their developing young through a placenta and yolk sac, something that is highly unusual among reptiles. Boa constrictors and green anacondas are two examples of viviparous snakes, meaning they give birth to live young with no eggs involved at any stage of development.
Ovoviviparous
: You can think of this as a "cross" between an egg layer and a snake that gives birth to live young. Female snakes that are ovoviviparous develop eggs inside their body. But when the babies are born, the female retains the eggs inside of her. So the hatchlings are born live, outside of an egg. Basically, the eggs hatch inside of the female, and the baby snakes emerge fully active with no shell at all. Rattlesnakes are ovoviviparous. This means they give birth to live young after developing and retaining the eggs inside their bodies.