From The New York Times:

_A research project aimed at weasels has turned up a bigger prize: a picture of a wolverine, an elusive animal scientists feared may have been driven out of the Sierra Nevada long ago by human activity.

The discovery could affect land-use decisions if the wolverine is declared an endangered species, a step the U.S. Fish and Wildlife Service is considering, although the animals typically live at high elevations where there is limited development._