FILE - This undated image provided by Glacier National Park, shows a wolverine inside Glacier National Park, Mont. The Obama administration announced Tuesday May 10, 2011 that it intends to work ... more 
FILE - This undated image provided by Glacier National Park, shows a wolverine inside Glacier National Park, Mont. The Obama administration announced Tuesday May 10, 2011 that it intends to work through a backlog of more than 250 imperiled animal and plant species, including the wolverine, over the next six years to decide if they need protection under the Endangered Species Act. less 
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Associated Press | Photo By Glalcier National Park, Jeff Copeland
Tue, May 10, 2011 2:55 PM EDT