Wildlife Research Trapper John's Ultimate Buck Lure - 4 ounces - Wildlife Research Center Trapper John's Ultimate Buck Lure is a complex lure that combines old forgotten secrets from the trappers of long ago. It is made up of highly attractive oils and Super-Premium Doe Urine with Estrus Secretions. This secret trapper recipe is part of Wildlife Research Center's Micro Brew Craft Scents line. Pique Many Of A Buck's Interests All At Once High Performance All Season And Rut 4oz Bottle