Common Swift

The Common Swift spends nearly its entire life airborne, only landing to nest in crevices on buildings or cliffs. It is not closely related to swallows or martins despite superficial similarities.

Its plumage is almost uniformly sooty blackish-brown, relieved only by a small pale throat patch, an appearance suited to a bird rarely seen at rest.

Because swifts almost never land, feathers are usually found near nest sites such as church towers and roof spaces rather than on open ground.

Size & Shape

• Flight feathers are unusually long, narrow, and scythe-shaped, among the most aerodynamically specialized of any European bird.
• The tail is short and forked; feathers are stiff to support high-speed, sustained flight.

Color & Pattern

• Body feathers are uniformly sooty blackish-brown with little variation, appearing almost black at a distance.
• A small, pale whitish-grey patch on the throat is the only notable plumage contrast.
• Feathers lack any iridescence or gloss found in Swallow or House Martin.

Similar Species

• The uniform sooty-brown color without gloss, combined with extremely long, narrow, curved flight feathers, distinguishes Swift from all hirundines (Swallow, House Martin, Sand Martin), which show white or pale underparts and glossier upperparts.

Overall Plumage

Uniform sooty blackish-brown overall with a small pale throat patch; no strong sexual or age-related color differences visible in the field.

Sex & Age Differences

Sexes look alike. Juveniles show slightly paler feather fringes, giving a faintly scaled look, before their first molt.

Molt

Molt occurs gradually, largely on the African wintering grounds, an adaptation to a life spent continuously in flight.

Habitat

Aerial over towns, villages, cliffs, and open country; nests in crevices under roof tiles, in towers, or on cliff faces.

Range

Breeds across Europe, western Asia, and North Africa; winters in sub-Saharan Africa.

Movements

Fully migratory and highly aerial, with some individuals remaining airborne for extended stretches outside the breeding season.

Behavior

Spends almost all its life in flight, eating and drinking on the wing; only lands to nest.

Diet

Feeds exclusively on airborne insects and spiders caught in flight.

Nesting

Nests in a crevice, typically under roof tiles or in a tower, using material caught in the air and glued with saliva.

Voice

A loud, screaming call given in fast, low flocks around nest sites, especially at dusk.

Field Notes

Feathers found near roof spaces, church towers, or old buildings with sooty-brown color and long, curved shape are typical of Swift, which almost never lands elsewhere.