Another trick we mossybacks use in the north when the fall leaves are on the ground is a little spray bottle of hydrogen peroxide. That blood will bubble. It can be quite exaspirating discerning blood spots in six inches of maple and oakleaves. Cheap too. I like that blacklight idea for those late bow kills.The eyes are playing tricks on you at dusk till night vision settles in. I posted the peroxide idea on a busy forum during deer season and those guys went nuts over it. Somebody markets a ŭ bottle of product that supposedly works by foaming and blacklight. It appears we have the formula covered. I had no idea blood reflected blacklight. These hunters were looking for stores that had it and I said to use peroxide. and look for the foam. Peroxide works on wet leaves, too.