>>No, some of the cameras don’t use a flash.<<
Well, that particular picture is definitely a flash picture.
Looks to me like it's taken with some sort of night vision camera. It looks like there is some sort of light source, but it may not be visible light. The arms look like toothpicks because most of their width did not show up in the picture, only that part at an angle to reflect light back to the camera.
It's a guy who was walking through the forest and bent down to examine the deer camera. The picture is weird because it's some sort of night vision camera. The guy was probably wearing glasses.