The muscle trick that makes it invisible
Most predators announce themselves through speed. The slender loris does the opposite. Its skeletal muscles are composed almost entirely of slow-twitch fibres, which means every movement it makes is so gradual and so free of tremor that the insects it hunts never register it as motion at all. An insect's threat-detection system is tuned to sudden changes in its visual field. A loris approaching at two centimetres per second simply does not cross that threshold. It is not sneaking. It is moving at a frequency the prey cannot read.
