The bird family Hirundinidae is a group of passerines characterised by their adaptation to aerial feeding, and known as swallows and martins . There is no scientific distinction between the two names, but the squarer tailed species tend to be called martins.
Their adaptations to hunting insects on the wing are a slender streamlined body, and long pointed wings. Like the unrelated swifts and nightjars , which hunt in a similar way, they have short bills, but a wide gape.
The feet are designed for perching rather than walking, and the front toes are partially joined at the base. Many species have long tails.
African River Martin Pseudochelidon eurystomina White-eyed River Martin Pseudochelidon sirintarae White-thighed Swallow Neochelidon fibialis Tawny-headed Swallow Alopochelidon fucata Southern Rough-winged Swallow Stelgidopteryx ruficollis Northern Rough-winged Swallow Stelgidopteryx serripennis Tree Swallow Tachycineta bicolor Mangrove Swallow Tachycineta albilinea White-winged Swallow Tachycineta albiventer Violet-green Swallow Tachycineta thalassina White-rumped Swallow Tachycineta leucorrhoa Chilean Swallow Tachycineta leucopyga Bahama Swallow Tachycineta cyaneoviridis Golden Swallow Tachycineta euchrysea Brown-bellied Swallow Notiochelidon murina Pale-footed Swallow Notiochelidon flavipes Black-capped Swallow Notiochelidon pileata Blue-and-white Swallow Notiochelidon cyanoleuca White-banded Swallow Atticora fasciata Black-collared Swallow Atticora melanoleuca Brown-chested Martin Progne tapera Purple Martin Progne subis Grey-breasted Martin Progne chalybea Caribbean Martin Progne dominicensis Southern Martin Progne modesta Brown-throated Sand Martin Riparia paludicola Sand Martin Riparia riparia Banded Martin Riparia cincta Congo Sand Martin Riparia congica Cameroon Mountain Rough-winged Swallow Psalidoprocne fuliginosa White-headed Rough-winged Swallow Psalidoprocne albiceps Black Rough-winged Swallow Psalidoprocne pristoptera Fanti Rough-winged Swallow Psalidoprocne obscura Square-tailed Rough-winged Swallow Psalidoprocne nitens White-backed Swallow Cheramoeca leucosternus Grey-rumped Swallow Pseudhirundo griseopyga Mascarene Martin Phedina borbonica Congo Martin Phedina brazzae Crag Martin Ptyonoprogne rupestris Rock Martin Ptyonoprogne fuligula Dusky Crag Martin Ptyonoprogne concolor Barn Swallow Hirundo rustica Red-chested Swallow Hirundo lucida Angolan Swallow Hirundo angolensis Pacific Swallow Hirundo tahitica Welcome Swallow Hirundo neoxena White-throated Swallow Hirundo albigularis Ethiopian Swallow Hirundo aethiopica Wire-tailed Swallow Hirundo smithii White-throated Blue Swallow Hirundo nigrita Pied-winged Swallow Hirundo leucosoma White-tailed Swallow Hirundo megaensis Pearl-breasted Swallow Hirundo dimidiata Blue Swallow Hirundo atrocaerulea Black-and-rufous Swallow Hirundo nigrorufa Greater Striped Swallow Hirundo cucullata Lesser Striped Swallow Hirundo abyssinica Rufous-chested Swallow Hirundo semirufa Mosque Swallow Hirundo senegalensis Red-rumped Swallow Hirundo daurica Striated Swallow Hirundo striolata Preuss's Cliff Swallow Hirundo preussi Angolan Cliff Swallow Hirundo rufigula Andean Cliff Swallow Hirundo andecola Tree Martin Hirundo nigricans South African Cliff Swallow Hirundo spilodera Red Sea Swallow Hirundo perdita Cliff Swallow Hirundo pyrrhonota Cave Swallow Hirundo fulva Indian Cliff Swallow Hirundo fluvicola Fairy Martin Hirundo ariel Forest Cliff Swallow Hirundo fuliginosa House Martin Delichon urbica Asian House Martin Delichon dasypus Nepal House Martin Delichon nipalensis