Sumatran Tigers

National Zoo Plans Free Concert For Endangered Tiger Effort The National Zoo is planning a concert featuring the band Portugal. The Man to draw attention to the dwindling number of about 400 Sumatran tigers left in the wild.
National Zoo's 'Endangered Song' For Sumatran TigersThe Smithsonian's National Zoo will unveil an 'endangered song' on Earth Day to highlight Sumatran tigers.