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Alpine Swifts are the largest swifts found in Europe. The upperparts, from frons to tail, are plain brown. The underparts are dominated by two broad white patches, one on the chin, the other from chest to belly, that are separated by a dark necklace. Like the necklace, the rest of the underparts, including the underwings, is dark greyish-brown. Only the inner wing coverts are darker brown. The white chin patch is often not visible in the field, making the species look dark-chinned. The irises are dark. The short bill is dark-grey. In flight the short legs are invisible. Juveniles resemble adults, but with pale edges to their feathers, giving them a scalloped appearance.

Some sources have moved the Alpine Swift from genus Apus to the newly defined genus Tachymarptis.

The overall distribution of this species can be assessed, and specific locations where birds have been spotted can be found, based on individual sighting reports submitted by birdwatchers to ebird.org .

The global distribution of the Alpine Swift is available HERE .

Alpine Swifts are a mostly migratory, but also partly sedentary species. Sedentary populations are found in near-coastal south-western Africa, the north-eastern part of the East African highlands, the northern coastal strip of the Hoorn of Africa, on Madagascar, and along the western coastal strip of India, southern India and on Sri Lanka. In addition, migratory populations overwinter in southern West Africa and in the East African highlands. A southern migratory population overwinters in/around Zimbabwe and breeds in eastern South Africa and Lesotho. The northern migratory populations disperse to southern Europe, parts of the coastal strip of Arabia, parts of the Levant (from north-eastern Egypt to Lebanon), Asia Minor, eastern Iran, and southern central Asia, from the Black Sea via the Caspian Sea to the Himalayas.

In Europe Alpine Swifts occur as summer breeding migrants primarily in the southern parts, from around the northern Mediterranean Sea to the Black Sea. Their distribution encompasses Iberia, southern France, the Alps, Italy, the Balkans the coastal areas around the Black Sea and the Caucasus mountains. They are also found on basically all islands of the Mediterranean and the northern Atlantic Ocean. There are occasional reports of sightings on the northern side of the Alps, mostly up to the latitude of the Danube River, and also in the southern half of the British Isles and Ireland.

During the breeding season Alpine Swifts will be found near suitable nest sites (rockfaces, ruins, houses, bridges, viaducts), in the vicinity of good hunting grounds (e.g. near water). Outside the breeding season their movements will be dominated by the availability of flying insects, which are often abundant in wetlands.

J. Pires reports finding Alpine Swifts in the Sado estuary, Zambujal, Portugal, in March 2020. Others were spotted at the Pocinho Dam, Vila Nova de Foz Coa, Guarda, Portugal, in April 2025. All sighting and photographic information presented on this page has kindly been contributed by J. Pires.