High Quality Content by WIKIPEDIA articles! The Yellow-faced Grassquit (Tiaris olivaceus) is a passerine bird from the Central American tropics and surrounding regions. It was formerly alled with the American sparrows and placed in the Emberizidae; actually, however, it is one of the tholospizan "finches" which are specialized tanagers (Thraupidae). As such, it is closely related to the famous Darwin's finches. It is a small bird with a conical bill, sharper than that of the related seedeaters. It is 3.9-4.2 in (10-10.7 cm) long and weighs about 0.28-0.35 oz (8-10 g), depending on subspecies. The adult male has an olive-green back, and its face and breast are black apart from a bright yellow throat, supercilia, and lower eyelid spot. The rest of the underparts are greyish olive. The beak and eyes are dark, the legs are grey. The adult female is slightly smaller on average than the male. It is dull olive-green above and paler grey below, and may have some dark breast smudges. The yellow face pattern is much weaker and duller, and may be almost invisible.

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