UDK-05 Ultimate Duck Call Kit This is the Ultimate Duck Calling System: It features our #1 selling and legendary DR-85 mallard call and as a complimentary call, the MP-90 whistle together with a 2 call lanyard. The instructional DVD (DVD-V2) covers instruction for these two calls in calling Mallards, Pintails, Widgeons, and Teal. Additional instruction is also given for other species of ducks as well as all species of geese. You will enjoy the hunts and be calling in birds of your own in no time with this system! .