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This is very difficult with java sparrows, as the coloration is pretty much identical.
1. The Male Java Sparrow is the only one that sings.
2. The beak on the male tends to look 'swollen' and a bit thicker than the hens.
The link below is a pretty good starting point.
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a or the
A sparrow landed on the roof. There was a loud noise and the sparrow flew away.
The first time you talk about something ( sparrow) use a, because we don't know about the sparrow, this is any sparrow. The second time sparrow is mention use the because we now know what sparrow you are talking about - it is the sparrow on the roof.
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Many things will eat a sparrow - the obvious one is a sparrow hawk, but many other hawks will eat a sparrow.
Cats and foxes will eat a sparrow if they can catch it.
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sparrow is collectively used for male and female sparrow.
If still you want to make sure, what is the gender then use words accordingly like
she sparrow, mother sparrow, etc
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White crowned sparrow is the closet relative, but others are the golden crowned sparrow and the Harris' sparrow.
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the boy sparrow has a black chest and is darker in colour the boy sparrow has a black chest and is darker in colour
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There is a strong belief that the Field Sparrow and the English sparrow are the same bird. They look very similar in their markings and feather coloring.
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