セスジキンノジコ Sicalis luteola

Small yellowish bird, very local in tropical savannas and open grassland with scattered bushes and palmetto shrubs. Usually in groups, sometimes in fairly big flocks. Feeds mainly in grasses, eating seeds, and comes to drink at small pools; often perches on roadside fences. Note the rather stubby gray bill, yellow face and underparts, and streaked back. There are no especially similar species in Mexico and Central America, but several in South America.