Small, finchlike bird of weedy and grassy areas in tropical lowlands. Often in small flocks, which associate readily with seedeaters and grassquits. Adult is handsome and striking with rusty upperparts. Black head and underparts are cut by a broad white swath from flanks across the lower breast. Note stout gray bill. Juvenile notably plain, buffy brown overall with stout bluish-gray bill. Note the pointed tail, unlike seedeaters and grassquits.