The Sind Sparrow (Passer pyrrhonotus), also known as the Sind Jungle Sparrow, Jungle Sparrow, or Rufous-backed Sparrow, is distributed in patches around the Indus valley region of Pakistan and adjoining parts of India, where its habitat is usually tall grass and thorn scrub near water. Both sexes of the Sind Sparrow are very similar to the House Sparrow, but slightly smaller, with a number of unique features. The Sind Sparrow is about 13 cm (5? in) long. It is gregarious, generally forming small groups of four to six birds while feeding and at breeding colonies. During winter, the non-breeding season, it forms larger flocks of as many as 30 birds, and joins flocks with other seed-eating birds. It mainly feeds on the seeds of grasses and other plants such as Polygonum plebeium.