As in the house sparrow, the male has brighter plumage than female and young birds, including black markings and a grey crown.

Its main vocalisations are soft chirping calls that are extended into longer songs with other sounds interspersed by breeding males.

Within its Indus valley breeding range in Pakistan and western India, the Sind sparrow is patchily distributed in riverine and wetland habitats with thorny scrub and tall grass.

Nests are made in the branches of thorny trees, and are untidy globular masses constructed from grass or other plant matter and lined with softer material.

[2] The breeding male has a short and narrow black bib and a broad chestnut eye stripe that does not meet the mantle.

[7][8] The song of breeding males includes chirrups interspersed with grating t-r-r-rt notes and short warbles or whistles.

[12] The sparrow was not recorded until 36 years later, despite the efforts of noted ornithologists Allan Octavian Hume in Sindh and William Thomas Blanford in eastern Iran.

[16][17][18] Ernst Hartert considered it a subspecies of the house sparrow, Passer domesticus pyrrhonotus, in his Die Vögel der paläarktishen Fauna,[19] but Doig and Claud Ticehurst both found that the two species bred in the same areas without interbreeding.

This name refers to Sindh, a province now in Pakistan which makes up a large part of the Sind sparrow's range, and the jungle habitat of the bird (in the word's original sense of tangled dry thicket).

[34][35] The Sind sparrow is somewhat common in its restricted breeding range,[33] and no threats are known to the survival of the species, so it is assessed as least concern on the IUCN Red List.

[1] During winter, it often makes short-distance movements, and some birds move into parts of western Pakistan and an adjoining corner of Iran, and less commonly north-western Gujarat, India.

[37] The construction and expansion of irrigation canals has increased its habitat in Sindh, and helped it extend its range into the Yamuna floodplain and parts of Rajasthan, India.

[8] Nesting occurs during a period of several months between April and September, the timing depending on rainfall, during which two clutches are raised by most pairs.

The nest has an entrance located higher up on the sides, is somewhat flat on top, and is lined with softer plant material and feathers.