Rondone maggiore

Tassonomia

The genus name is from the Ancient Greek takhus, "fast", and marptis, "seizer". The specific name melba comes from ‘melano-alba’ or ‘mel-alba’, the two colours that Linnaeus referred to these in his description. A total of ten sub-species are currently recognised (see distribution below).

Nome scientifico

Tachymarptis melba

Autorità

(Linnaeus, 1758)

Ordine

Apodiformi

Famiglia

Apodidae

Genere

Tachymarptis

Areale e habitat

It is a polytypic species found all year-round in eastern and southern Africa, Madagascar, western peninsular India and Sri Lanka, with larger non-breeding distributions in western, eastern and southern Africa, parts of the western edge of the Arabian peninsula, and breeding across southern Europe in the west across Turkey, northwards through the Caucasus and along the east coast of the Black Sea to the Crimean peninsula and Central Asia up to Turkestan and to the south along Iran and Afghanistan up to Balochistan in Western Pakistan and further east along the Himalayas. There are also scattered populations in northwestern Africa with an isolated population in Northern Libya. The distribution of the 10 sub-species are: (1) A. m. melba (76-120g) described originally by Linnaeus (1758) with type-locality Gibraltar distributed across southern Europe (east from Iberian Peninsula) and northern Morocco and east through Asia Minor to northwest Iran and wintering in west, central and east Africa, (2) A. m. tuneti (95-110g) described by von Tschusi in 1904 with type-locality in Tunisia and distributed across central and eastern Morocco eastwards to Libya and through Middle East and Iran (except northwest where A. m. melba) to southeast Kazakhstan and up to western Pakistan, and wintering in west and east Africa, (3) A. m. archeri described by Hartnert (1928) with type-locality Hargeisa, in Somaliland distributed from the Dead Sea depression at the borders of Israel and Jordan, south to southwest Arabia and Somalia, (4) A. m. africanus (67-87g) described by Temminck (1815) with type-locality in South Africa distributed across east and southern Africa and southwest Angola with some populations of this sub-species wintering in east Africa, (5) A. m. maximus (128g) described by Ogilvie-Grant (1907) with type-locality in the eastern slopes of the Rwenzori mountains at 10,000-12,000 ft distributed across Uganda and DR Congo, (6) A. m. marjoriae described by R D Bradfield (1935) from Quickborn, Damaraland distributed in Namibia and adjacent western South Africa in the northwestern parts of Northern Cape, (7) A. m. willsi described by Ernst Hartnert (1896) from Madagascar and endemic to the island, (8) A. m. nubifugus described by Koelz (1854) distributed across the Himalayas and wintering in central India, (9) A. m. dorabtatai described by Abdulali (1965) distributed in western peninsular India, (10) A. m. bakeri described by Hartert (1928) from Sri Lanka distributed only on that island-nation. In the western palearctic, temperate and mediterranean zones, it is typically in the mountains but occasionally in lowlands, while in remainder of sub-Saharan Africa and south Asia, it occurs in a larger variety of habitats ranging from sub-desert steppe to mountains. It typically breeds below 1500 m but may sometimes go up to 2300 m. In the tropical parts of it range in Kenya, it has been recorded breeding above 4000 m and in the Himalayas, it has been observed foraging at 3700 m. Seen entering probable nesting sites at 2100 m on Madagascar.

Migrazione

Complete migrants

Comportamento

It has a powerful and rapid flight with deep slow wing beats. They are known to engage in twilight ascent, which is characterised by increased flight activity and gaining altitude and longer-distance horizontal flights at dawn and dusk, possibly part of social interactions between individuals. Alpine swifts spend most of their lives in the air, living on the insects they catch in their beaks. They drink on the wing, but roost on vertical cliffs or walls. A study published in 2013 showed Alpine swifts can spend over six months flying without having to land. All vital physiological processes, including sleep, can be performed while in air. In 2011, Felix Liechti and his colleagues at the Swiss Ornithological Institute attached electronic tags that log movement to six alpine swifts and it was discovered that the birds could stay aloft in the air for more than 200 days straight.<p>The alpine swift's diet consists mainly of arthropods, principally insects but also spiders. Insects across 10 orders and 79 families were documented in the diets of individuals from Africa and Europe, with the homoptera, diptera and hymenoptera being the most often consumed.

Conservazione

Tendenza della popolazione

stable