The Black-striped Sparrow has a gray head marked with black stripes and yellow edging on the shoulder. In Costa Rica it uses shrubs and forest edges in humid lowlands, forming pairs or family groups.
Adults have a gray head with black stripes on either side of the crown and another narrow stripe through the eye. The back is olive, the shoulder edge is yellow, and the throat and belly are whitish.
In Costa Rica it uses low shrubs, weedy fields, young secondary growth, and forest edges in humid areas. It lives in pairs or family groups and does not form flocks, according to the account.
An extinction-risk assessment has not been added yet.