Lark Sparrow vs Vesper Sparrow

Lark Sparrow

Chondestes grammacus

Small29 gShrubland

The lark sparrow is distinctive. Adults have a typically sparrow-like dark-streaked brown back, and white underparts except for a dark central spot. The cheeks and crown sides are chestnut, with white eyebrow and crown stripes. The dark tail's corners are also white. Young lark sparrows are duller, and the underparts are streaked. Measurements: Length: 5.9–6.7 in (15–17 cm) Weight: 0.8–1.2 oz (24–33 g) Wingspan: 11.0 in (28 cm) Voice: The song is two clear notes followed by a mixture of buzzes and trills. The flight call is a thin sit.

ID text from Wikipedia, CC BY-SA 4.0

Recording: steve · CC BY-SA 4.0

Photo: iNaturalist user: desertnaturalist · CC BY 4.0

Vesper Sparrow

Pooecetes gramineus

Small26 gGrassland

The vesper sparrow is 14–16 cm (5.5–6.3 in) in overall length and weighs 19.5–28.3 g (0.69–1.00 oz). Adults have light brown upper-parts and light under-parts, both with darker streaking. There are three features that are unique to the vesper sparrow. The first is the presence of a small, white ring surrounding the eyes. The second is the flash of white tail feathers seen during flight. The third is the presence of a chestnut patch on the shoulder. However, this is usually not visible to an observer.

ID text from Wikipedia, CC BY-SA 4.0

Recording: Jonathon Jongsma · CC BY-SA 4.0

Photo: Tim from Ithaca · CC BY 2.0

Photos and recordings are credited to their authors under the licence shown. Full profiles: Lark Sparrow and Vesper Sparrow.