Baird's Sparrow
Centronyx bairdii
The Baird's sparrow can be identified as a small brown streaked sparrow. Their faces are a yellow-brown color featuring subtle black markings. These birds have a narrow band of brown streaks on their chests. This species can be distinguished from others by its unique broad ochre central crown stripe. Juveniles exhibit similar coloration but often have more streaking. Adult size is comparable for both males and females, no sexual dimorphism is exhibited. Adults are generally about 12 cm (5") and weigh 17–21 g (½ to ¾ oz); their wingspan is usually around 23 cm (9").
ID text from Wikipedia, CC BY-SA 4.0

Henslow's Sparrow
Centronyx henslowii
Adults have streaked brown upperparts with a light brown breast with streaks, a white belly and a white throat. They have a pale stripe on the crown with a dark stripe on each side, an olive face and neck, rust-coloured wings and a short dark forked tail. Measurements: Length: 4.3–5.1 in (11–13 cm) Weight: 0.4–0.5 oz (11–14 g) Wingspan: 6.3–7.9 in (16–20 cm)
ID text from Wikipedia, CC BY-SA 4.0

Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Baird's Sparrow and Henslow's Sparrow.