The combination of forming a C-shape, flattening its abdomen and making a motion of lateral undulation in the air makes it possible for the snake to glide in the air, where it also manages to save energy compared to travel on the ground and dodge earth-bound predators.[1] The concave wing that the snake creates in flattening itself, flattens its body to up to twice its width from the back of the head to the anal vent, which is close to the end of the snake's tail, causes the cross section of the snake's body to resemble the cross section of a frisbee or flying disc.[2] When a flying disc spins in the air, the designed cross sectional concavity causes increased air pressure under the centre of the disc, causing lift for the disc to fly.[12] The snake continuously moves in lateral undulation to create the same effect of increased air pressure underneath its arched body to glide.[10] Flying snakes are able to glide better than flying squirrels and other gliding animals, despite the lack of limbs, wings, or any other wing-like projections, gliding through the forest and jungle it inhabits with the distance being as great as 100 m.[10][13] Their destination is mostly predicted by ballistics; however, they can exercise some in-flight attitude control by "slithering" in the air.[5]