Barn Swallow vs Blue Swallow

Hirundo rustica compared with Hirundo atrocaerulea

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Side-by-Side Comparison

Attribute Barn Swallow Blue Swallow
Scientific Name Hirundo rustica Hirundo atrocaerulea
Order Passeriformes Passeriformes
Family Hirundinidae Hirundinidae
Conservation Status Least Concern Endangered
Length 19.0 cm (7.5 in)
Wingspan 33.0 cm (13.0 in) 22.3 cm (8.8 in)
Weight 19.0 g (0.67 oz) 13.700000000000001 g (0.48 oz)
Diet Aerial insects caught in continuous agile flight, including flies, beetles, moths, and aphids. Drinks by … --
Clutch Size 2-7 2-4
Population Trend
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Size Comparison

Body Length
Barn Swallow 19.0 cm
Blue Swallow
Wingspan
Barn Swallow 33.0 cm
Blue Swallow 22.3 cm
Weight
Barn Swallow 19.0 g
Blue Swallow 13.700000000000001 g
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Habitat Comparison

Shared Habitats

Barn Swallow only

Blue Swallow only

Barn Swallow

Open farmland, meadows, and areas near water. Nests almost exclusively in human-made structures such as barns, bridges, and eaves.

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Song & Call Comparison

Barn Swallow

Song

A rapid, twittering song: a long stream of 'vit-vit-vit' and rolling chirps. Also gives a sharp 'vit' flight call. Song can last many minutes without pause. Musical and liquid.

Blue Swallow

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Geographic Range & Migration

Barn Swallow

Breeds across the Northern Hemisphere in North America, Europe, and Asia. Winters in South America, Africa, and South Asia.

Blue Swallow

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Conservation Status

Least Concern

Barn Swallow

Endangered

Blue Swallow

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How to Tell Them Apart

Barn Swallow

Plumage

Metallic blue-black upperparts, rufous forehead and throat, and pale buff to rufous underparts. Deeply forked tail with elongated outer streamers.

Bill

Short, wide, flat black bill adapted for catching insects in flight

Blue Swallow

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About These Birds

Barn Swallow

The barn swallow is the most widespread swallow species in the world and has one of the longest migrations of any passerine. Its arrival signals spring across the Northern Hemisphere, inspiring cultural references from ancient Greece to modern poetry. Barn swallows have become almost entirely dependent on human structures for nesting.

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