Диадемовый просяночник Sporophila lineola

Very small finchlike bird with a short stubby bill. Males are mostly black with a white belly. Note the male’s white crown and large white mustache. Females are dull and plain brown and are difficult to separate from the Lesson’s Seedeater of Amazonia. Found in grasslands and shrubby areas; often seen in large flocks, especially on migration.