Barn Swallow Identification Guide
A sleek, fork-tailed swallow with steel-blue upperparts and rusty throat, best known for its deeply forked tail and acrobatic low flight over fields and water.
Read the full Barn Swallow encyclopedia entry →
Key Field Marks
- Size & shape: Small songbird (15–19 cm including tail streamers) with long, pointed wings and a long, deeply forked tail ending in thin streamers.
- Upperparts: Glossy steel-blue to blue-black on the back, crown, and wings.
- Face & throat: Rusty-orange to chestnut forehead and throat, separated from the pale underparts by a dark blue breast band.
- Underparts: Pale buffy-orange to whitish belly (color varies by subspecies/region).
- Tail: The deepest fork of any regularly encountered swallow, with a row of white spots visible when the tail is fanned/spread.
- Flight: Fast, low, and swooping, often skimming just above grass, water, or roads while foraging on flying insects.
Similar Species
- Cliff Swallow: Square, not forked, tail; pale buffy rump patch and dark chestnut cheek patch with a pale forehead — Barn Swallow lacks the pale rump and has the long forked tail.
- Cave Swallow: Similar chestnut face pattern but shorter, square tail and paler, buffier throat; no long tail streamers.
- Tree Swallow: No rusty throat, iridescent blue-green (not steel-blue) upperparts, clean white underparts, and a notched (not deeply forked) tail.
Habitat & Range
Breeds nearly worldwide across the Northern Hemisphere in open country near structures — barns, bridges, culverts, and eaves — where it builds mud-cup nests; forages over fields, pastures, ponds, and wetlands. A long-distance migrant, wintering in Central and South America, Africa, and southern Asia.
Best Time to See
Common and conspicuous from spring through early fall in breeding areas; often seen in large numbers gathering on wires before fall migration. During migration, look for loose flocks foraging low over open fields and water bodies.
Voice
A cheerful, continuous twittering warble mixed with harsh "chit-chit" or "vit" call notes; the song is a rapid series of squeaky, gurgling warbles often ending in a dry rattle, frequently given from wires or in flight.
Frequently asked questions
How can I tell a Barn Swallow from a Cliff Swallow?
Barn Swallow has a long, deeply forked tail and no pale rump patch, while Cliff Swallow has a square tail and a conspicuous pale buffy rump.
What color is the Barn Swallow's throat?
It has a rusty-orange to chestnut throat and forehead, separated from the paler belly by a dark blue-black breast band.
Where do Barn Swallows nest?
They build open mud-cup nests lined with grass and feathers on ledges, beams, and walls of barns, sheds, bridges, and other structures, almost always near water or open foraging habitat.
How do Barn Swallows differ from Tree Swallows?
Barn Swallows show a rusty throat, steel-blue back, and a deeply forked tail, while Tree Swallows have a clean white belly, iridescent blue-green back, and only a shallow notch in the tail.
Barn Swallow identified by the community
Recent Barn Swallow sightings identified with Bird Identifier.
