Java Sparrow, Lonchura oryzivora,
Hey whats this doing here? this isn't a Mannikin or Munia is it...Well yes it is, and one that even the new bird keeper will recognize.
If you want to see the many colour variations and learn about this popular occupant of cage and aviary take a look at Garrie's excellent information on this species at
http://www.zebrafinch.com