Unknown Red and Black beetles
 

I was walking the backyard yesterday trying to find something to photograph and came across these red and black beetles. There were hundreds of them in a single 1 square foot area. I have no idea what kind they are. If you have any guess let me know. Found in North Texas

Pictures
http://www.gather.com/viewSlideshow....?albumId=35947

video
http://www.youtube.com/watch?v=cBMKk6HeFq0