How do Crotalinae typically differ from Viperinae in their reproductive method?
Answer
They are viviparous
The Crotalinae subfamily, or pit vipers, are largely viviparous, meaning they give birth to live young that have developed within the mother and are nourished via a placental connection. This adaptation is particularly advantageous in cooler climates because the internal development of embryos allows the mother to regulate their temperature, leading to a higher survival rate compared to oviparous species, which lay eggs that would be vulnerable to cold or unpredictable environmental conditions.
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