Those to are bugs. Was watching a monsterquest episode bout things that look like that appearing in camera's, and they proved that it's bugs. We've got tons of pics with a bug flying at the right time in front of the camera and that happens.
Here is a very handy and effective device I use to dispense corn with - but it could also be used to dispense any other seed or deer feed.
I had an old feeder that had a failed motor... I made a set of brackets to attach the feeder to the rear of the 4 wheeler - the lower one encircles the feeder and has a forward section with holes drilled in the outer ends of the bracket... these holes align with two 5/16" bolts that drilled into the rack of the 4 wheeler.
The upper bracket is an "L" shaped...