The Olive Sparrow, Arremonops rufivirgatus, is a species of American sparrow in the family Emberizidae. This bird is also known as the Green Finch and the Texas Sparrow. Its range includes Mexico and southern Texas. It is a non-migratory bird and is resident in thickets, chaparral, and undergrowths near forests.
The Olive Sparrow is 5.5 to 6 inches long and is the only sparrow with an olive back. It has a distinctive brown eye streak and a brown-striped crown. It has a beige-like breast, some white belly feathers, and a conical beak. The sexes are similar, although young birds are more beige with some streaking on the belly.
The nest of this bird is built two to five feet above the ground. It is large, made of straws, twigs, bark, leaves, and stems. Two to five white and unspotted eggs are laid by the female each season between March and September. The male sings an unmusical chip note similar to the Swamp Sparrow.