VIDEO: Roarsome! Newborn Tiger Cub Is A Boy, Says Zoo

The tiger cub makes his presence known in his new surroundings in the U.K's London Zoo. (ZSL London Zoo/Zenger)

London Zoo has confirmed that a Sumatran tiger cub, born to mother Gaysha last month, is a boy.

The yet-unnamed male cub was born on Dec. 12 at the London Zoo in Regent’s Park, the world’s oldest scientific zoo, operated by the Zoological Society of London.