The difference between male sparrow and female sparrow are:
Male sparrow
Image Source: upload.wikimedia.org/wikipedia/commons/a/a2/House_Sparrow_Male_(Passer_Domesticus).jpg
It is bigger in size than the female sparrow.
ADVERTISEMENTS:
It has a reddish brown back and grey head.
It has black beard-like patch from chin to breast.
Female sparrow
ADVERTISEMENTS:
It is in comparison to the male.
It has a uniform pale brown body.
The bib-like patch is absent.