Boa constrictors are thick-bodied snakes with an average weight of 20-30 pounds, but some reportedly get to be 100 pounds. They are an average of 8-10 feet, with some reaching 12 feet or more.

Ronaldo, a 6-foot Brazilian rainbow boa constrictor kept at a school in England, was thought to be male — until the snake gave birth to 14 babies last month. The boa had not had contact with ...