Waders shucked and air-drying on side of the truck, a beautiful Mexican Mallard pair rests on the tailgate. Closer to Mexico than to Pheonix, Ramsey Russell meets with local hunter Colin Shepherd, recounting the days' events and discussing Arizona duck hunting while endless miles of train boxcars keep rolling past.  What characterizes typical Arizona duck hunting, how'd Shepherd get started duck hunting in the state where 4 deserts converge, and what really hooked him on it?