You are thinking of infared flash, which is commonly used in camera traps, night vision surveillance and photography equipment. Most terrestrial animals can't see any further into the infrared* than we can. You would also need a camera that is sensitive to IR, off the shelf most cameras are designed to be as insensitive to IR as possible.
Originally posted by Thekillerqueen Would i get away with putting red plastic or sellophane over my external Argus flash
no, you will just get red images, and you will still spook the animals.
Originally posted by Thekillerqueen I have seen a lot of night time photos that have used red light and red flashes and the photos (unedited) show up as normal flash lighting (no hint of red).
That is because they were shot in infrared and converted to B&W. Some trap cameras do use visible light, but they are inherently disruptive to wildlife and should be banned.
*Certain Lizards, insects,crustaceans,fish and birds have hyperspectral vision that allows them to perceive the polarization of light and see wavelengths that are invisible to us.