The pectoral sparrow (Arremon taciturnus ) is a species of bird in the family Passerellidae. It is found in Bolivia, Brazil, Colombia, French Guiana, Guyana, Peru, Suriname, and Venezuela. Its natural habitat is subtropical or tropical moist lowland forests. The Brazilian name for this species is tico-tico-de-bico-preto, which in translation means "black billed sparrow".
The species can be found everywhere in the Amazon Basin except for its western parts. Besides the Amazon jungle it is found in eastern and north-eastern Brazil.