Plain-backed sparrow

{{Short description|Species of bird}}

{{Speciesbox

| name = Plain-backed sparrow

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=BirdLife International |date=2016 |title=Passer flaveolus |volume=2016 |page=e.T22718194A94572013 |doi=10.2305/IUCN.UK.2016-3.RLTS.T22718194A94572013.en |access-date=12 November 2021}}

| image = Plain-backed Sparrow - Thailand_S4E6685 (22638588530).jpg

| image_caption = Male in Thailand

| taxon = Passer flaveolus

| authority = Blyth, 1845

| synonyms = * Passer jugiferus Bonaparte, 1850

• Passer assimilis Walden, 1870

| synonyms_ref = {{harvnb|Summers-Smith|1988|pp=199–200}}{{harvnb|Giebel|1877|p=35}}

}}

The plain-backed sparrow (Passer flaveolus), also called the Pegu sparrow or olive-backed sparrow, is a sparrow found in Southeast Asia. Its range spans from Myanmar to central Vietnam, and south to the western part of Peninsular Malaysia.