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FeatherSavannah Sparrow (Passerculus sandwichensis)
Savannah Sparrow primary wing feather, female by U.S. Fish & Wildlife Service, National Fish and Wildlife Forensics Laboratory, via the FWS Feather Atlas, Public domain
songbird

Savannah Sparrow

Passerculus sandwichensis

A common, finely streaked grassland sparrow with a short notched tail and a hint of yellow over the eye, blending easily into open fields.

Feather type
Finely streaked brown contour feathers, short notched tail feathers, subtly yellow-tinged supercilium feathers
Colours
Brown and buff streaked above and below, yellowish tinge over the eye in many individuals, white belly, crisp fine streaking
Bird size
Small sparrow, ~11-15 cm, variable by subspecies

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Overview

The Savannah Sparrow is a widespread, variable sparrow of open grasslands, coastal marshes, and agricultural fields across North America. Its plumage varies considerably among the many recognized subspecies, from pale sandy birds of dry grasslands to darker, heavier-streaked coastal populations.

Despite this variability, most individuals share a crisp, fine streaking pattern and a short, notched tail that distinguishes them from other streaky sparrows in open-country habitat.

Feathers from this species tend to look neat and finely marked rather than boldly blotched, with a pale yellowish wash sometimes visible near the face in fresh plumage.

Identifying the Feather

Size and Shape

Small sparrow feathers with a notably short, notched tail compared to related species.

Color and Pattern

  • Crown, back, and underside feathers show fine, crisp brown-black streaking on a buff-white ground.
  • A pale yellowish tinge often appears on the supercilium (eyebrow) feathers, though this varies by subspecies and can be faint or absent.
  • Legs are pink; overall feather tone tends toward pale sandy-brown rather than warm rufous.

Comparisons

Compared to the Song Sparrow, which has a longer rounded tail and a bold central breast spot, Savannah Sparrow feathers show finer streaking and a shorter, notched tail. The Vesper Sparrow, a similar grassland species, shows white outer tail feathers that Savannah Sparrows lack.

Plumage & Molt

Plumage is highly variable across the many recognized subspecies, ranging from pale and lightly marked in dry grassland populations to dark and heavily streaked in some coastal and Alaskan populations. Sexes look alike. Juveniles resemble adults but with buffier overall tone. One complete molt occurs after breeding.

Habitat & Range

Savannah Sparrows breed across most of Canada, the northern and western United States, and coastal areas in grasslands, meadows, and salt marshes. Most populations migrate to winter across the southern United States, Mexico, and Central America, though some coastal populations are resident year-round.

Behavior & Field Notes

This species forages on the ground for seeds and insects, typically walking or running rather than hopping, and often flushes low over grass before dropping back down. It builds a well-hidden cup nest on the ground in dense grass. Its song is a thin, buzzy, insect-like trill. A small, finely streaked feather found in an open grassy or marshy field is a good match for this widespread species.

Frequently asked questions

What tail shape helps identify a Savannah Sparrow feather?

A short, notched tail feather is typical, unlike the longer rounded tails of species such as the Song Sparrow.

Does every Savannah Sparrow feather show yellow near the face?

No, the yellowish tinge on the supercilium varies by subspecies and individual, and can be subtle or absent.

How can I tell this species from a Vesper Sparrow by feather alone?

Vesper Sparrows show white outer tail feathers, which Savannah Sparrows lack, along with a chestnut shoulder patch not present in Savannah Sparrows.

Why is there so much color variation among Savannah Sparrow feathers?

The species includes many geographically distinct subspecies whose plumage tone ranges from pale sandy to darker and heavily streaked.