Disappearing Mule Deer A New Reality Throughout Western U.S.

NPR | Jan. 04, 2013 4:02 p.m.

Contributed By:

Luke Runyon

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Scientists throughout the West are trying to figure out the mystery of the disappearing mule deer. Since the 1970s, biologists in Colorado, Wyoming and Utah have seen deer populations drop by 50 percent. The potential causes vary. Oil and gas development and the growth in coyote populations top the list.