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Size: Snake size varies to extremes by species. At up to 30 feet long, the reticulated python is the longest snake. At a minuscule 4 inches, the Barbados thread snake is the smallest.
Weight: The green anaconda isn't the longest snake, but it is the heaviest - they can grow up to 550 pounds!
Lifespan: In captivity, some species will live as long as 50 years. Snake lifespan in the wild is more difficult to determine.