The male of the tiny Scrub Euphonia is simply attired with blue-black head, upperparts, and chest, and yellow on the forecrown and remaining underparts. Females are duller; pale yellow below and greenish-gray above and may suggest a female manakin (Pipridae). This common bird is found from sea level to about 1500 m in a variety of habitats including arid to humid forest, scrubby woodland, agricultural land with scattered trees, and fruiting trees in villages. The widespread race affinis ranges from southern Tamaulipas and Oaxaca to Costa Rica. The race godmani is found on the Pacific Slope of Mexico from southern Sonora to Guerrero at elevations of sea level to about 1000 m. It differs from the race affinis by having white undertail coverts and different calls. It strongly resembles the White-vented Euphonia (Euphonia minuta) but the two are allopatric. Euphonias often join mixed flocks of fruit-eating birds. Listen for this species’ doubled or tripled dee or deen notes, quite different from the various call notes of similar euphonias with which it is likely to occur.