Seaside Sparrow illustration
Birdsong field guide

Seaside Sparrow

Ammospiza maritima

A large, dark-plumaged sparrow specialized for life in coastal salt marshes, characterized by a long bill and a dingy, streaks-heavy appearance.

What it sounds like

A harsh, buzzy, and mechanical 'ok-a-chee-drrr' reminiscent of a muffled Red-winged Blackbird song.

Reference call, compare with what you heard
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Rec. Sue Riffe · United StatesCC BY-NC-SAXeno-canto

Field notes

  • Possesses specialized supraorbital salt glands that allow the bird to drink seawater and excrete excess salt.
  • One subspecies, the Dusky Seaside Sparrow, famously went extinct in 1987 due to habitat loss and pesticide use in Florida.
  • Unlike many other sparrows that hop, the Seaside Sparrow typically walks or runs along the mudflats while foraging.
  • Their diet is unique among sparrows, heavily featuring marine invertebrates like small crabs, snails, and amphipods.
  • They build open-cup nests in marsh grass just inches above the high-tide line, leaving them highly vulnerable to sea-level rise.
Habitat
Tidal salt marshes dominated by cordgrass (Spartina) and rushes.
Range
Atlantic and Gulf Coasts of the United States, from New Hampshire south to Texas.

Similar & commonly confused birds

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