DENVER
06/30/2010 02:53 pm ET | Updated May 25, 2011

Baby Tigers At Denver Zoo Turn One Month Old (PHOTOS)

The Denver Zoo celebrated the one-month anniversary of the birth of four endangered Amur Tiger cubs by releasing the first public photos. The cubs were born at the zoo on May 31 to mother Koshka and father Waldemere, who was himself born at the zoo in 2003. There are only an estimated 400 Amur tigers left in the wild. The cubs can not yet be seen by the public.

PHOTOS: