Why don't anacondas lay eggs like other snakes do?

The interesting thing is anacondas produce eggs but incubate them internally, this is Ovoviviparity. The reason for this is most likely because of the habitat they live in. It would probably evolve for cases where eggs would ether be drowned or dry out if they were laid and incubated externally. read more

To my knowledge, they lay eggs inside their body, so they are protected inside the mother until they hatch. Pythons which are close relatives of boas (usually boas occur in the New World, while pythons are in Asia, Africa, and Australia), on the other hand lay eggs and let them hatch outside of the mother. read more

Garter snakes, water snakes, boa constrictors, anacondas, rattlesnakes, cottonmouths, copperheads, and all other vipers give live birth. And some people are half right. Anacondas don't have eggs which hatch inside of them. read more

Anacondas give birth to live young, unlike pythons, which all lay eggs. However, anacondas are actually ovoviviparous, meaning they retain eggs internally until the young hatch. While they are carrying developing eggs inside, females typically do not eat. The gestation period is about six to seven months. read more