California Towhee
Melozone crissalis
The California towhee's coloring is dull brown overall with light rust undertail covert feathers and buff or rust-colored streaks at the throat. There is little sexual dimorphism. California towhees have the short, rounded wings of a sparrow, as well as a long tail and a thick beak which is used for cracking seeds. However, the towhees are larger and bulkier than sparrows. Both sexes of towhee generally grow to be 8.3–9.8 in (21–25 cm) in length, with a wingspan of about 11.4 in (29 cm). They weigh 1.3–2.4 oz (37–68 g).
ID text from Wikipedia, CC BY-SA 4.0

Fox Sparrow
Passerella iliaca
Adults are among the largest New World sparrows, heavily spotted and streaked underneath. All feature a messy central breast spot though this is less noticeable on the thick billed and slate-colored varieties. Plumage varies markedly from one group to another. Measurements: Length: 15–19 cm (5.9–7.5 in) Wingspan: 26.7–29 cm (10.5–11.4 in) Weight: 26–44 g (0.92–1.55 oz)
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: California Towhee and Fox Sparrow.