In Montana, and elsewhere, Moose populations are shrinking, but no one knows exactly why . . .
Hunters spent more than 4,200 combined days in the field searching for moose across Montana in 2011, but the harvest total was the lowest in more than half a century.
The possible answers remain up for debate. But wildlife managers fear the situation could be bleak and worsening.
Shrinking moose populations have become the subject of escalating concern across the U.S…