The longest snakes that are found in the wild or that are living in zoo today are reticulated pythons
The reticulated python gets its name from the distinctive color and pattern on its scales.
Reticulated pythons inhabit steamy tropical rainforests (Mattison 1999). These snakes are heavily dependent on water and can often be found near small rivers or ponds. They require tropical environments with temperatures in the range of 80 - 92 degrees F.
The reticulated Python lives in rain forests, woodland, and nearby grasslands. It is also associated with rivers and is found in areas with nearby streams and lakes. An excellent swimmer. It has even been reported far out at sea and has consequently colonized many small islands within its range
Their natural diet includes mammals and occasionally birds. Small specimens up to 3–4 m (10–14 ft) long eat mainly rodents such as rats, whereas larger individuals switch to prey such as Viverridae (e.g. civets and binturongs), and even primates and pigs. Near human habitation, they are known to snatch stray chickens, cats, and dogs on occasion. Among the largest, fully documented prey items to have been taken are a half-starved Sun Bear of 23 kilograms that was eaten by a 6.95 m (23 ft) specimen and took some ten weeks to digest as well as pigs of more than 60 kg (132 lb). As a rule of thumb, these snakes seem able to swallow prey up to one-quarter their own length and up to their own weight. As with all pythons, they are primarily ambush hunters, usually waiting until prey wanders within strike range before seizing it in their coils and killing via constriction. However, there is at least one documented case of a foraging python entering a forest hut and taking a child.