Yellow-faced Grassquit

Tiaris olivaceus




Tanagers (Thraupidae)

Code 4


Code 6



Breeding Type:

Monogamous, Solitary nester

Egg Color:

Pale blue with gray and brown flecks.

Number of Eggs:

2 - 4

Incubation Days:

12 - 14

Egg Incubator:


Nest Location:

Atop grassy tussock, on ground, or in low bush.

Nest Material:

Grasses and twigs.





Yellow-faced Grassquit: This tiny bird has olive upperparts, upperwing and tail; tail is short. They have pale olive underparts, a black face, breast and upper belly with yellow eyebrow and throat patch; pale yellow crescent shape below the eye. Sexes are similar. Females are a duller green, without black markings; supercilium is a pale creamy color, throat patch is much paler. Juvenile resembles female, but grayer and duller. Juveniles have less yellow and lack black on their face and breast.

Range and Habitat

Yellow-faced Grassquit: This species is a resident breeder in the West Indies and Mexico from the Rio Grande Valley to the Yucatan Peninsula and south to northern Ecuador and Venezuela. It occurs as a rare vagrant to south Florida and southern Texas. Its preferred habitats include open grassy fields, brushy thickets, and shrubs.

Breeding and Nesting

Yellow-faced Grassquit: Two to four pale blue eggs flecked with gray and brown are laid in a nest of sticks and twigs lined with fine grass and hair in tall grasses or low in shrubbery. Female incubates eggs for about 12 days.

Foraging and Feeding

Yellow-faced Grassquit: They feed almost exclusively on various grasses. They pluck seeds from the inflorescences of tall grasses, in addition to gathering seeds from the open ground. They also eat berries, small fruits, insects and nectar. They forage in a mixed flock, hopping and searching for seeds. They also forage perched from grass stems, using their feet to hold the tip of the blade.

Readily Eats

Commercial Mixed Bird Seed


Yellow-faced Grassquit: Song is a buzzing insect like trill.

Similar Species

Yellow-faced Grassquit: Not likely to be confused with any other species in its range.


Belly, undertail coverts, chest, flanks, and foreneck.

Back, rump, hindneck, wings, and crown.
The ventral part of the bird, or the area between the flanks on each side and the crissum and breast. Flight muscles are located between the belly and the breast.
The upper front part of a bird.
Also called the supercilicum or superciliary it is the arch of feathers over each eye.
The front part of the head consisting of the bill, eyes, cheeks and chin.
Also called the superciliary, it is the arch of feathers over the eye.
Parts of a Standing bird X
Head Feathers and Markings X
Parts of a Flying bird X