Black-striped Sparrow
Arremonops conirostris
The black-striped sparrow is about 16.5 cm (6.5 in) long and weighs 26 to 42 g (0.92 to 1.5 oz). The sexes have the same plumage. Adults of the nominate subspecies A. c. conirostris have a mostly gray head with wide black stripes on each side of the crown and a thin black strip through the eye. Their upperparts, tail, and wings are olive-green with yellow at the bend of the wing. Their throat is whitish, their breast and sides pale gray, their belly whitish, and their lower flanks and undertail coverts washed with olive-buff. Voice: The black-striped sparrow's song in Honduras is described as "several rich calls before accelerating into a longer series, wareep-weep!-warih-weep!-chu-chu-chu-chu-chu'chu'chu'chu'chu'chu'chu'tu'tu'tu'tu'tu'tu'tu'tu-weep!". In Venezuela it has at least three songs, "a slow, measured wü...
ID text from Wikipedia, CC BY-SA 4.0
Olive Sparrow
Arremonops rufivirgatus
The olive sparrow is about 12 to 14 cm (4.7 to 5.5 in) long and weighs 15 to 30 g (0.53 to 1.1 oz). The sexes have the same plumage. Adults of the nominate subspecies have a brown crown with a wide olive gray stripe through its middle and down the nape. They have drab to olive brown lores, a wide buffy gray supercilium, and a thin brown line through the eye on an otherwise gray face. Their upperparts are uniformly olive. Their tail is brownish olive to olive with light yellowish outer edges on the feathers. Voice: Only the male olive sparrow is believed to sing. Its song is an "accelerating series of somewhat musical, downslurred tsip, chip, or tsew notes, usually dropping in pitch at the end of the series", and has been described "as sounding like a metallic ball bouncing on a concrete floor".
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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