The visual ghost trails must have something to do with the recorder trigger algorithm for motion sensing and lack of motion detection timing as many visible high contrast black objects are grey under IR I have found from my tests and may serve as a good defense from aggressors with similar poor monochromatic IR vision .\
SNIP....
Animal eyes often appear to reflect light brightly in the dark due to a special layer of tissue called the tapetum lucidum. The tapetum lucidum is found behind the retina in the back of the eye and acts as a mirror-like structure.
When light enters the eye, it passes through the retina, where photoreceptor cells called rods and cones detect the light and send signals to the brain for visual processing. However, not all the light that enters the eye is absorbed by the photoreceptor cells. Some of the light that passes through the retina is reflected by the tapetum lucidum back through the retina, giving it a second chance to be detected.
The tapetum lucidum consists of layers of reflective cells that contain special pigments, such as guanine crystals or other reflective substances. These pigments effectively bounce the light back through the retina, increasing the chance of capturing more available light.
This reflective effect is particularly beneficial for animals that are active in low-light conditions or at night, such as nocturnal animals. By reflecting and amplifying the available light, the tapetum lucidum enhances their night vision and allows them to see more clearly in dimly lit environments.
The specific color of the eyeshine varies depending on the animal and the structure of the tapetum lucidum. Some animals, like cats, display a bright green or yellow eyeshine, while others may have an orange, blue, or white eyeshine.
It's important to note that not all animals possess a tapetum lucidum, and the intensity of eyeshine can vary among species. Animals with well-developed tapeta tend to exhibit more noticeable eyeshine in the dark.