Scientific Name: Geothlypis poliocephala
Population Estimate: 500K to 5M
Range / Habitat: Lowland shrub land, grass land, degraded former forest in southern Mexico and Central America.
Field Notes: Warbler with relatively large bill, yellow underparts, olive upperparts. Grey crown and small black mask distinguish it from Olive-crowned Yellowthroat, Common Yellowthroat, and Masked Yellowthroat.
Personal Notes: Seen in Monteverde area, Costa Rica