A large male plains bison, Bison bison bison grazes in Theodore Roosevelt National Park's north unit, in McKenzie County, North Dakota. The south unit is separate, in Billings County. The blood on his side came from rubbing extensively on a tree, seen here: www.flickr.com/photos/furryscalyman/8021973780. Also, I know nothing about video editing, so if anyone can recommend a program...   MAH01854