So preoccupied are they with each other that they simply do not notice a gentle disturbance in the water below them. Little do they know that one of them is lunch. A pair of eyes and a pair of nostrils breaks the surface of the water. The nostrils dilate, and air in inhaled. Movement above catches the animal's attention, and the nostrils begin to rise up from the surface.
Movement is slow and barely perceptible.
The bats have no idea they're being watched. The crocodile estimates the distance between itself and the branches, binocular vision providing an accurate fix. Crocodiles can use their tails with great force, propelling themselves forwards through the water with great speed. By angling its body towards the surface and swimming upwards at speed, the crocodile is capable of launching itself out of the water for over half its body length or more. One of the bats looks downwards.