Java sparrow (Padda oryzativa) is an
endemic bird to Java and Bali. It used to be a
very common bird, but due to over exploitation
the bird has declined and been classified as
Vulnerable (BirdLife International, 2001). In
Indonesia bird-keeping is a popular pastime,
with deep cultural roots (Jepson and Ladle,
2005). It is widely assumed that the hobby
negatively affects wild populations of common
as well as threatened birds (Jepson and Ladle,
2005; Nash, 1994), such as Java sparrow.