The bird is wearing a standard lock-on raptor band. Raptors have bills that are much like a pair of pliers and can pull a butt-end band off. Lock-on band have a flange of metal that that gets folded over to lock the band seam. http://neblandvm.outdoornebraska.gov/wp-content/uploads/2013/10/IMG_2388.jpg I have a few which I keep for the rare occasion that I catch a harrier or accipiter in a net (or stumble upon a harrier nest while doing coastal prairie inventories). -- Mike Patterson Astoria, OR String Theory http://www.surfbirds.com/community-blogs/northcoastdiaries/?p=2182 OBOL archives: www.freelists.org/archive/obol Manage your account or unsubscribe: //www.freelists.org/list/obol Contact moderators: obol-moderators@xxxxxxxxxxxxx