orange-billed sparrow Arremon aurantiirostris

Boldly patterned, rather chunky sparrow of humid evergreen forest and edge in tropical lowlands. Usually on or near the ground in shady understory and thickets; often in pairs. Bright orange bill virtually glows in the dark; also note the bold black-and-white head pattern and black chest setting off the white throat. No similar species in its lowland range.