 On March 2 , 2011 , the United States Fish and Wildlife Service declared the Eastern cougar ( Puma concolor couguar ) officially extinct . 
 On March 2 , 2011 , the United States Fish and Wildlife Service declared the Eastern cougar ( Puma concolor couguar ) officially extinct . 
On March 2 , 2011 , da United States Fish and Wildlife Service declared the Eastern cougar ( Puma concolor couguar ) officially extinct .