Native to the jungles and grassy marshes of Southeast Asia, Burmese pythons are among the largest snakes on Earth. They are capable of reaching 23 feet (7 meters) or more in length and weighing up to 200 pounds (90 kilograms) with a girth as big as a telephone pole. When young, they will spend much of their time in the trees. However, as they mature and their size and weight make tree climbing unwieldy, they transition to mainly ground-dwelling. They are also excellent swimmers, and can stay submerged for up to 30 minutes before surfacing for air.
Burmese pythons actually incubate their eggs by raising the temperature within the coils by as much as seven degrees above the air temperature. This is accomplished by frequent "hiccupping" or muscle spasms. Once the babies hatch, they are on their own and must fend for themselves. They hatch at about 12 to 18 inches (31 to 46 cm) in length.