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Alpine swift
Tachymarptis melba | Alpengierzwaluw | Vencejo real
The Alpine Swift is the largest swift of the Mediterranean: nearly twice the weight of a Common Swift and with a wingspan that suggests a small falcon. Over a cliff face or a cathedral it gives itself away by the white belly flashing from below.
Voice
A long metallic trill that continually changes pitch: ti-ti-ti-tirrrrrrr-ti-ti, first accelerating and rising, then slowing and falling, sometimes for half a minute on end. That alone separates it from the flat, even scream of a Common Swift. Around colonies it is heard all day, loudest in the late afternoon.
Recording: tsilianidis saky — CC BY-SA 4.0 · Wikimedia Commons
Identification
Heavily built, with long scythe-shaped wings and a short, shallowly forked tail. The upperparts are uniform grey-brown; below there is a white throat and a large oval white belly patch, separated by a brown breast band that stays visible as a line even at range. Flanks and undertail coverts are dark, so the white sits as a detached oval in the middle of the underside. The wingbeats are slower and heavier than a Common Swift's, with long glides in which the bird hardly seems to move.
Confusion species
Common Swift is clearly smaller and uniform sooty brown, with at most a faint pale throat patch; the white belly and the brown breast band are absent altogether. Pallid Swift is likewise far smaller and browner, with a stronger head and throat pattern and broader-based wings, and again no white on the belly. At long range a Hobby can mislead, but it has streaked underparts, rusty thighs and a driving flight with only short glides.
Habitat
Rock faces, gorges and steep mountain flanks, and along the coast high sea cliffs. Also tall old buildings — cathedrals, castle towers, town walls — that serve as artificial rock. Hunts high in the open air over mountain ranges, alpine pasture and cities, often tens of kilometres from the colony; in cold, wet weather it drops to low levels over lakes and reservoirs.
Where the bird is most at home, classified with EUNIS — the European standard for habitats.
Range and movements
Breeds in southern Europe, north-west Africa, Turkey and the Middle East, eastwards to the Himalayas; resident populations occur in eastern and southern Africa, Madagascar and India. European breeders winter in tropical and southern Africa. In the Netherlands it is a scarce vagrant, with about eighty accepted records up to 2022, almost all birds overshooting from the south: nearly half in spring between late March and late June, most of the rest between mid-August and early November.
- Breeding (summer)
- Winter
- Passage
- Migration direction
- dark = core range, pale = thinly spread
Where and when to look
In Spain go to a limestone massif or an urban cliff in May — the cathedral rock of Cuenca, the Tajo at Ronda, the Hoces del Duratón — and watch between midday and late afternoon, when the birds circle highest above the rim and call most. In the Netherlands a spell of persistent south-easterly wind in April or May is the moment to scan the coast and the large waters among the first Common Swifts.
Conservation status
Not globally threatened (IUCN: Least Concern), with a wide range and a stable world population. In parts of Europe it is increasing, as building colonies spread into new towns. Local pressures are renovations that seal nest cavities in towers and churches, and disturbance of cliff colonies by climbing routes.