Swamp Sparrow

The Swamp Sparrow (Melospiza georgiana) is a medium-sized, stocky sparrow of North American wetlands. Known for its secretive nature and striking chestnut-and-gray plumage, this bird is more often heard than seen as it skulks through dense aquatic vegetation. Despite its retiring habits, its bright, metallic call and rich, slow trilling song are signature sounds of northern marshes, bogs, and wet meadows in spring and summer.

Key Field Marks

• Head: In breeding plumage, adults sport a bright rufous-chestnut crown, a prominent gray face and neck collar, and a dark line running through the eye. In the winter, the crown becomes streakier with a gray central stripe.
• Underparts: A clean, unstreaked pale gray breast and belly, contrasting sharply with a stark white throat.
• Upperparts: The back and wings are heavily painted with rich chestnut, rufous, and black, making it look much warmer-toned than many other North American sparrows. The tail is relatively short and reddish-brown.
• Bill and Legs: The bill is dark gray (often showing yellow at the base of the lower mandible), while the legs are noticeably long and pinkish, adapted for wading.

Similar Species

• Chipping Sparrow: Also possesses a rufous crown, but is much smaller and slimmer, has a stark white eyebrow, a black line through the eye, a clear gray chest, and lacks the warm rufous wings and back of the Swamp Sparrow.
• Song Sparrow: Coexists in similar wet, brushy brush, but has heavy, dark breast streaking that converges into a central spot. It lacks the plain gray chest and white throat of the Swamp Sparrow.
• Lincoln's Sparrow: Features a buff-colored chest band with very fine, crisp black streaking, whereas the Swamp Sparrow's breast is unstreaked gray.

Habitat

True to its name, the Swamp Sparrow is heavily tied to damp, watery environments. During the breeding season, they occupy freshwater wetlands, including cattail marshes, brushy bogs, sedge meadows, and shrubby margins of ponds and slow-moving streams. In winter, they can also be found in wet brushy fields, overgrown ditches, and coastal brackish marshes.

Range and Migration

• Breeding Range: Spreads across the boreal forest and temperate zones of Canada and the northern/north-eastern United States.
• Wintering Range: Migrates south to winter in the eastern, central, and southern United States, as well as northern Mexico. They are short-distance migrants, often traveling in loose flocks alongside other sparrow species.

Feeding and Foraging

Unlike many sparrows that feed on dry ground, Swamp Sparrows frequently forage in shallow water, sometimes wading like tiny sandpipers or picking insects off the surface of floating vegetation. They primarily eat aquatic invertebrates, beetles, ants, and caterpillars during the breeding season, transitioning to seeds of sedges, grasses, and smartweed during winter.

Vocalizations

The song of the Swamp Sparrow is a sweet, liquid, slow trill on a single pitch, softer and much richer than the dry, mechanical rattle of a Chipping Sparrow. Their call note is a remarkably loud, metallic "chip" or "chink" that rings out clearly across wet meadows, often giving away their presence in thick cover.

Nesting

The female builds an open cup nest out of grasses, sedges, and cattails. This nest is typically placed low to the ground or water surface in a tussock of sedges, a shrub, or dense cattails. They lay 3 to 5 pale green or blue eggs, heavily splotched with brown.