The Southern African Rock Python (Python sebae natalensis) is one of the world’s largest snakes, with some reaching 6 metres (20 feet) in length. They are found in a range of habitats including savanna, forest, semi-desert, rock areas and grassland. Rock Pythons are not venomous and kill their vertebrate prey by constriction. Like other snakes, they sense their prey by smell – their flicking tongue transfers scent molecules into a specialised organ in the roof of the mouth called the vomeronasal organ or Jacobson’s Organ. Their diet includes antelopes, monkeys, warthogs, large birds and reptiles as well as rats, dogs, goats and poultry in settled areas. This beautifully marked immature Southern African Rock Python was videoed crossing a road in Kruger National Park, South Africa, flicking its forked tongue as it moved.