Do those cameras make any noise when they take a picture? I was thinking if there was a bug resting on the camera, and it makes some noise when triggered by the deer, it might scare the bug into jumping off the camera and into the picture?
There is a very faint sound when the shutter activates but not a sound that would scare anything. Do bugs have ears? It only takes one picture, when a truck drives past there is only a single picture even if it is pulling a trailer. There are no houses in that direction and no roads for several miles.