Chestnut-and-black weaver

{{Short description|Species of bird}}

{{Speciesbox

| name =

| image = Vieillot's black weaver (Ploceus nigerrimus castaneofuscus) male.jpg

| image_caption = Male in Ghana

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=BirdLife International |date=2016 |title=Ploceus castaneofuscus |volume=2016 |page=e.T103812253A104238797 |doi=10.2305/IUCN.UK.2016-3.RLTS.T103812253A104238797.en |access-date=8 February 2023}}

| genus = Ploceus

| species = castaneofuscus

| authority = Lesson, RP, 1840

| synonyms =

}}

The chestnut-and-black weaver (Ploceus castaneofuscus) is a species of bird in the family Ploceidae. It is found in West Africa from Sierra Leone to southern Nigeria.

The chestnut-and-black weaver was formerly treated as a subspecies of Vieillot's black weaver (Ploceus nigerrimus). The species were split based on the striking differences in the colour of the plumage.{{cite web| editor1-last=Gill | editor1-first=Frank | editor1-link=Frank Gill (ornithologist) | editor2-last=Donsker | editor2-first=David | editor3-last=Rasmussen | editor3-first=Pamela | editor3-link=Pamela Rasmussen | date=January 2023 | title=Old World sparrows, snowfinches, weavers | work=IOC World Bird List Version 13.1 | url=https://www.worldbirdnames.org/bow/weavers/ | publisher=International Ornithologists' Union | accessdate=7 February 2023 }}{{cite journal | last1=Craig | first1=A.J.F. | last2=del Hoyo | first2=J. | last3=Collar | first3=N. | last4=Kirwan | first4=G.M. | date=2022 | title=Chestnut-and-black Weaver (Ploceus castaneofuscus), version 1.0 | editor1-last=Billerman | editor1-first=S.M. | editor2-last=Sly | editor2-first=N.D. | journal=Birds of the World | location=Ithaca, NY, USA | publisher=Cornell Lab of Ornithology | doi=10.2173/bow.viewea2.01 }}