Based on the provided reference, the Virginia Zoo has added a green anaconda to its collection, and green anacondas are considered the heaviest snakes in the world. The reference refers to "Angie," a 2-year-old green anaconda at the Virginia Zoo, which is already 5 feet long.
It is important to note that size can be measured by length or weight. While the reference specifies the green anaconda as being the "heaviest", it doesn't definitively state that Angie is the single biggest snake in terms of length in any zoo. Further research would be needed to determine the longest snake in captivity across all zoos. However, the Virginia Zoo is a reasonable answer based on the provided content.
