The giant panda cub at Washington's National Zoo appears to be in excellent health, zookeepers said after a physical exam on Sunday.    The panda, born on Friday, weighs 4.8 ounces, is pink with white fur and squealed loudly when taken away from its mother.

A second cub was stillborn Saturday night, but the zoo was happy at the prospect of one healthy cub given that pandas are critically endangered and breeding them in captivity has proven difficult.    The cub's mother, Mie Xiang, gave birth to her only surviving cub, a male named Tia Shan, in 2005.   He was returned to China in 2010.  China owns the pandas at the National Zoo.